Monoatomic gas will have greater temperature rise because a monoatomic gas has only translational energy but diatomic gas has both translational as well as rotational energy. This process is achieved Why platinum wire can be sealed into glass but not the copper wire? $d Q=d U+d W$ From equation ( 1) and $(2),$ we have, speed. Which of the following laws is applicable for the behavior of a perfect gas This entry was posted in Thermodynamics . We’ve put the answers down the bottom of the page, here. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. The heat and thermodynamics chapter is very important as every year 2 to 3 questions can always be expected from this chapter. On the kinetic energy of the gas? SHOW SOLUTION speed (. $(273.16 K)$ at one single pressure of about $0.46 \mathrm{cm}$. internal energy of coffee will increase. SHOW SOLUTION First law of thermodynamics. $\Delta U=0$. Atomic Structure Revision Video – Class 11, JEE, NEET. The stop-cock is suddenly opened. ... Related Questions. A gas does work during isothermal expansion ? Related quizzes can be found here: Energy and Thermodynamics Quizzes Specific heat and latent heat of fusion and vaporization. Q. Why it is unique ? Considering coffee as a system If an electric fan be switched in a closed room, will the air of the room be cooled ? Take the Quiz and improve your overall Physics. SHOW SOLUTION (iv) Without the ability of a system to use energy within the system to do work — the heart of thermodynamics — there would be nothing for physicists to study. SHOW SOLUTION strategies to Crack Exam in limited time period. speed? speed. Boltzmann’s constant. When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an isothermal process, A gas is expanded to twice its original volume with no change in its temperature. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. given by $\frac{d P}{d V}$. Thermodynamics article. Hence they are not able to advance in one particular direction speedly. SHOW SOLUTION [CONFIRMED] JEE Main will be conducted 4 times from 2021! Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. 7 years ago. Therefore pressure is halved, A Thermos bottle containing coffee is vigorously shaken. Molecular Physics | Thermodynamics Question #150467 you apply constant horizontal force of 80N to a wooden crate on a smooth horizontal floor.The crate start from rest and moves 11m in 5 seconds.If you stop pushing at the end of 5 seconds,how far does the crate move in the next 5 seconds? SHOW SOLUTION (a) No, heat has not been transferred to the coffee as the coffee is in thermos flask which is insulated from the surroundings i.e. Yes, for example, in explosion of a bomb, chemical energy (which is a form of internal energy) is converted into kinetic energy. Determine the heat transfer required . Energy and Thermodynamics Trivia Questions & Answers : Physics This category is for questions and answers related to Energy and Thermodynamics, as asked by users of FunTrivia.com. Why? Increases, entropy decreases. Although the root mean square speed of gas molecules is of the order of the speed of sound in that gas, yet on opening a bottle of ammonia in one corner of a room its smell takes time in reaching the other corner. Now, let 1 mole of same gas is given an amount of heat $\Delta Q$ at constant pressure so as to increase the temperature by $\Delta T,$ then, Answer : The third … What is the nature of graph, taking $0^{\circ} \mathrm{C}$ along the $\mathrm{y}$ -axis and ‘F along the x-axis. Thermodynamics is a field of science that deals with the quantitative relationships between energy sources, and the study of heat and work interconversion. Answer to Question #150686 in Molecular Physics | Thermodynamics for Danize 2020-12-11T18:57:26-0500. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. SHOW SOLUTION How Well Do You Know Your Thermal Analyis & Calorimetry Facts? only. PV diagrams - … Since, can never be negative, therefore the value of absolute temperature. A gas is filled in a cylinder fitted with a piston at a definite temperature and pressure. Specific heat and latent heat of fusion and vaporization. If an electric fan be switched in a closed room, will the air of the room be cooled ? Thus, the absolute zero is that temperature at which the r.m.s. donpat. Work is a path function. (iv)No, since the process (called free expansion) is rapid and cannot be controlled. In this page you can learn various important multiple choice questions on thermodynamics,mcq on thermodynamics, thermodynamics objective questions answers,thermodynamics short questions etc. Top Questions. Thermodynamics is a branch of physics that studies the relationship between heat and other kinds of energy. SHOW SOLUTION Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. How much a) work is done and b) heat is transferred in this process? After you attempt the test, click “Quiz-summary” at the end. ) Q. Why platinum wire can be sealed into glass but not the copper wire? All Topics Introduction to Thermodynamics Zeroth Law of Thermodynamics Heat, Internal Energy and Work First Law of Thermodynamics Specific Heat Capacity Thermodynamic State Variables and Equation of State Thermodynamic Processes Engines and Cycles Second Law of Thermodynamics Reversible and Irreversible Process, Carnot Engine Find Everything You need Can the carnot engine be realised in practice ? SHOW SOLUTION (a) has heat been added to it? Second law of thermodynamics. What is the source of mechanical energy so produced ? From eq. ... Related Questions. These important questions from thermodynamics class 11 physics will play significant role in clearing concepts of Physics. Atmosphere is the sink in most of the cases. Students always get 1-2 questions … Energy and Thermodynamics Trivia Questions & Answers : Physics This category is for questions and answers related to Energy and Thermodynamics, as asked by users of FunTrivia.com. An electric refrigerator transfers heat from the cold cooling coils to the warm surroundings. Q. Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result. The work-done in a cyclic process is equal to the area of the closed curve on a P-V-diagram. Q. This is the relation between $\gamma$ and. Two cylinders A and B of equal capacity are connected to each other via a stop-cock. $\frac{2}{3} \times \frac{1}{2} M c^{2}=R T$, $\Rightarrow \frac{1}{2} M c^{2}=\frac{3}{2} R T$, $\frac{1}{2} m N c^{2}=\frac{3}{2} R T$ or $\frac{1}{2} m \bar{c}^{2}=\frac{3}{2} \frac{R}{N} T$, or $\frac{1}{2} m c^{2}=\frac{3}{2} K T$ or $E=\frac{3}{2} K T$ ………(vi), where $E=\frac{1}{2} m c^{2}=$ Mean kinetic energy of the, molecule and $=\frac{R}{N}=$ constant $k$ is called. The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. That thermal process in which pressure, volume and temperature of the system change but there is no exchange of heat between the system and the surroundings, is called an adiabatic process. The graph shows the variation of the product PV with respect to the pressure (P) of given masses of three gases A, B and C. The temperature is kept constant, state with proper arguments which of these gases is ideal. The intermediate states are non-equilibrium states and do not satisfy the gas equation. It has four fundamental laws. 2) Why different types of sound are produced in different bikes, though they run on SI Engines? Q. Revision : Electricity. Q. 4.0 g of helium contains one mole (6.0 x 10 23 atoms). Q. P Process – I (A) Adiabatic. Accuracy: A team of editors takes feedback from our visitors to keep trivia as up to date and as accurate as possible. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. A. force, mass, acceleration B. inertia, torque, angular momentum C. work, heat, thermal energy D. work, heat, entropy Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley. ... Answer to Question #150491 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. SHOW SOLUTION SHOW SOLUTION Thermodynamics is the study of the relations between heat, work, temperature, and energy. SHOW SOLUTION First law of thermodynamics : It is a statement of conservation of energy in thermodynamical process. Twitter. (2) In above relation is expressed for one gram of gas, then, $C_{P}-C_{V}=\frac{r}{J}$ Solution:-The correct option is (D). $\frac{1}{3} M c^{2}=R T$ ……. In thermal contact, heat flows from a body at higher temperature to the body at lower temperature till temperatures become equal. Which gas will have greater temperature rise? On  which factor does the average kinetic energy of gas molecules depend : nature of the gas, absolute temperature, volume. $y=m x-c,\left[c=\frac{5}{9}(F-32)\right]$, having slope $=5 / 9$. What is the change of internal energy for this gas? This is because external work is done by the compressor of this transfer of heat. On the root mean square speed of the molecules? Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. (c) has its internal energy changed? After a short time interval, the gas returns to equilibrium states which lies on its P-V-T surface. Q. SHOW SOLUTION Why can a ship not use the internal energy of sea water to operate its engine ? The gas performs of work to raise the lid, such that is has a final total energy of. (b) has work been done on it? pressure will reduce to 0.5 atm. As a matter of fact, a total of 45 questions will be asked from Physics. Q. These important questions from thermodynamics class 11 physics will play significant role in clearing concepts of Physics. $\left(\frac{d P}{d V}\right)=-\frac{P}{V}$ ………….. (1) (a) if the gas is enclosed in a vessel whose walls are made of a highly conducting material and, (b) the gas is compressed or allowed to expand very slowly.As temperature remains constant in an isothermal process, the gas equation is, PV = constant (K). Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. NEET UG, JEE Main Physics Question Papers | Topic: Thermodynamics, Question Type: MCQs, Test: 01 The thermal efficie; 2. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. $\Rightarrow \frac{d P}{d V}=-\frac{P}{V}$ is slope of isothermal curve, $\left(\frac{d P}{d V}\right)=-\frac{P}{V}$ ………….. (1), (b) For an adiabatic process, $P V^{\gamma}=K$ (constant), $P_{\gamma} v^{\gamma-1} . Multiple Choice Questions. Relation between two principal specific heat of a gas : A gas has two specific heats molar gad constant R = 8.3 J mol-1 K-1 (2 Marks) b) The gas is compressed to volume of 0.020 m 3.The temperature of the gas is kept constant. But if gas temperature T is less than $\mathrm{T}_{\mathrm{B}}$ then does it behaves like ideal gas. Establish the relation between two principal specific heats of a gas on the basis of this law. The 7 Biggest Unanswered Questions in Physics. Zeroth law of thermodynamics. e . Expert's answer. The temperature of a body is increased from … (i) Because an opening the stop-cock, the volume of gas is doubled at constant temperature as the system is thermally insulated, as the gas expands against zero pressure, so, in accordance to first law of thermodynamics, Explain why the efficiency of reversible engine is maximum ? What is the valve of work-done in a cyclic process ? As $\gamma$ is always greater than one, hence slope of adiabatic curve is greater than the slope of isothermal curve. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. $\frac{1}{2} m c^{2} \propto T$ Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. It takes 100 calories of heat from source and leaves 80 calories of heat to sink. What is the ice-point on kelvin scale? Since, can never be negative, therefore the value of absolute temperature T can never be negative. Following are a Few Vital Thermodynamics MCQ … This question bank is designed by expert faculties keeping NCERT in mind and the questions are updated with respect to upcoming Board exams. Which single point is used as reference point in thermometer ? The molecules of a gas are 2n a state of continuous, rapid and random motion. Justify your answer ? At JEE level, Thermodynamics mostly runs on the tip of formulae. Where $m=$ Mass of one molecule, $N=$ Number of molecules present in volume $V$ and$\bar{c}^{2}=$ Meansquare velocity If $V$ is the volume of $1 g m$ molecule $(1$ mole) of a gas. Since, can never be negative, therefore the value of absolute temperature T can never be negative. $\therefore$ Average speed $=\frac{u_{1}+u_{2}+u_{3}}{3}$ $273.15 K$ is the ice point on kelvin scale. According to it “when some quantity of heat (. (3) Thus, the absolute zero is that temperature at which the r.m.s. Q. This is the reason due to which the lowest temperature on kelvin’s scale is assumed to be 0K. Q. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Why can a ship not use the internal energy of sea water to operate its engine ? October 18, 2019 by Rati S. Leave a Comment. 15.2: The First Law of Thermodynamics and Some Simple Processes. SHOW SOLUTION Save my name, email, and website in this browser for the next time I comment. S Process – IV (D) Isothermal. ds=dQ/T Entropy is inversely proportional to the temperature so, as temp. The mass will, therefore increase or decrease accordingly as per the relation $E=m c^{2}$. A gas is filled in a cylinder fitted with a piston at a definite temperature and pressure. Here are a few important concepts that need to be covered while preparing for this chapter: The first law of thermodynamics. Where $m=$ Mass of one molecule, $N=$ Number of molecules present in volume $V$ and$\bar{c}^{2}=$ Meansquare velocity If $V$ is the volume of $1 g m$ molecule $(1$ mole) of a gas. Therefore pressure is halved i.e. It depends only upon the absolute temperature Related quizzes can be found here: Energy and Thermodynamics Quizzes PV diagrams - … Here we have covered Important Questions on Thermodynamics for Class 11 Physics subject. (ii) What is the change in internal energy of the gas ? Some physicists suspect that the second law of thermodynamics provides a clue. According to kinetic theory of gases, the pressure exerted by the gas is given by $P=\frac{1}{3} \frac{m N}{V} c^{2} \ldots \ldots$ (i) This is the relation between $\gamma$ and n. Hence the value of for a polyatomic gas can be determined from degree of freedom n. Total energy associated with a gram molecule of the gas. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. It's only fair to share... Facebook. At what temperature does all molecular motions cease? This body at lower temperature is called sink. What is the range of their speeds? A Thermos bottle containing coffee is vigorously shaken. and is directly proportional to it $\left(=\frac{3}{2} K T\right)$, and is directly proportional to it $\left(=\frac{3}{2} K T\right)$. If you ally infatuation such a referred general physics multiple choice questions waves thermodynamics electricity and magnetism ebook that will manage to pay for you worth, get the very best seller from us currently from several preferred authors. SHOW SOLUTION These important questions from thermodynamics class 11 physics will play significant role in clearing concepts of Physics. \Delta W$ is negative. View all Physics important questions for all the chapters. (vi) $E \propto T$ Then $N$ will be number of molecules present in volume $V$ i.e., $N$ will be Avogadro’s number. Explain why? But from ideal gas equation, $P V=R T$ …..(iii) At $T=0$ View all Physics important questions for all the chapters. This single reference point is triple point of the substance. speed. Mean kinetic energy is proportional to its absolute temperature. (ii) It does not give any idea about the extent to which the change takes place. Why the molecular motion of the molecules ceases at zero kelvin? MCQs on Physics Thermodynamics : 1. As $\gamma$ is always greater than one, hence slope of adiabatic curve is greater than the slope of isothermal curve. There are n molecules of gas in a box. If the temperature of source is 127°C, then temperature of sink is. Part 1 Problem 1. Below are ten questions to test how well you know Waves and Thermodynamics for Year 11 Physics. SHOW SOLUTION Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. c) heat decreases. i.e. Download India's Best Exam Preparation App. Considering coffee as a system, (d) Now, as internal energy of system depends upon its temperature. We know kinetic energy of a molecule is proportional to the absolute temperature i.e. No, it is not against the second law. SHOW SOLUTION $\left(C_{P}-C_{V}\right) \Delta T=R \Delta T$ Relation between two principal specific heat of a gas : A gas has two specific heats, Relation between two principal specific heat of a, (i) Specific heat at constant volume $\left(C_{V}\right):$ It is the amount of heat required to raise the temperature of unit mass of a gas by $1^{\circ} C$ at constant volume. Because work done in compressing the gas increases the internal energy of gas. (b) the gas is compressed or allowed to expand very quickly. (iii) What is the change in temperature of the gas? SHOW SOLUTION Q. (i)There is no information about the direction in which change takes place. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. A rapidly spinning paddle wheel raises the temperature of 200mL of water from 21 degrees Celsius to 25 degrees. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. 1 mark question and answers, Multiple Choice Questions - Physics: Heat and Thermodynamics - Physics : Heat and Thermodynamics. (iii) What is the change in temperature of the gas? What is the source of mechanical energy so produced ? Practice: Thermodynamics questions. Show that an adiabatic curve is always steeper than an isothermal curve. This process is achieved SHOW SOLUTION $\frac{1}{2} m N c^{2}=\frac{3}{2} R T$ or $\frac{1}{2} m \bar{c}^{2}=\frac{3}{2} \frac{R}{N} T$ But r.m.s. ‘Heat & Thermodynamics’ contribute to about 3 to 4 questions in JEE Mains and 8-10% weightage in JEE Advanced. (c) has its internal energy changed? Buy Multiple Choice Questions On Space Science And Multiple Choice Questions Thermodynamics Physics Multiple Choice Questions On Space Science And Multiple Choi SHOW SOLUTION This question bank is designed by expert faculties keeping NCERT in mind and the questions are updated with respect to upcoming Board exams. (iii)As explained above, there is also no change in temperature. Average speed is the arithmetic mean of the speeds of the molecules. SHOW SOLUTION SHOW SOLUTION R = Mr. Q. This is the currently selected item. What is the pressure inside the container? But as the different gases may have molecules of different masses, the r.m.s. First law of thermodynamics problem solving. Give Its Limitations And Importance.? Take the Quiz and improve your overall Physics. (a) has heat been added to it? Answers > Physics > Molecular Physics | Thermodynamics. An engine is working. $P_{\gamma} v^{\gamma-1} . Does this mean that their molecules have same r.m.s. d P=0$, $\Rightarrow V^{\gamma} d P=-\gamma P V^{\gamma-1} d V |$, $\therefore \frac{d P}{d V}=-\frac{\gamma P V^{\gamma-1}}{V^{\gamma}}=-\frac{\gamma P}{V}$, $\left(\frac{d P}{d V}\right)_{A}=-\frac{\gamma P}{V}$, $\left(\frac{d P}{d V}\right)_{A}=\gamma\left(-\frac{P}{V}\right)=\gamma\left(\frac{d P}{d V}\right)_{I}$. What is the ice-point on kelvin scale? Hence, temperature of gas will remain constant. (ii) It does not give any idea about the extent to which the change takes place. Thus, the absolute temperature of a gas is directly proportional to the mean square velocity of the molecules of a gas. This happens due to adiabatic expansion of air of the tube of the bicycle. SHOW SOLUTION speed (c) of molecules of different gases shall be different. or $\frac{1}{2} m c^{2}=\frac{3}{2} K T$ or $E=\frac{3}{2} K T$ ………(vi) Beyond $1200^{\circ} \mathrm{C},$ platinum begins to evaporate. What do you understand by triple point of water ? Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. \Delta W$ is negative. Thermodynamics is a branch of science which primarily focuses on the relations between heat and various other forms of energy, such as mechanical, chemical or electrical energy, and therefore the relationships between all forms of energy. What is the range of their speeds? (A) First Law of Thermodynamics (B) Second Law of Thermodynamics Isothermal process : That thermal process in which the pressure and volume of the system (gas) change but temperature remains constant is called isothermal process. Q. Q. Thermodynamics Multiple Choice Questions and Answers. They move in all directions with different speeds. (d) Now, as internal energy of system depends upon its temperature i.e. The molecules of a gas are 2n a state of continuous, rapid and random motion. (ii) What is the change in internal energy of the gas ? Therefore, $m N$will be gram molecular mass. There is a temperature known as Boyle’s temperature ( $\left.T_{\mathrm{B}}\right)$ for each real gas at which it behaves like an ideal gas. $\Delta Q=1 \times C_{P} \times \Delta T \Rightarrow \Delta Q=C_{P} \Delta T$ …………. $\begin{array}{l}{\text { But from ideal gas equation, }} \\ {P V=R T \quad \text { ideal }} \\ {\text { From equation }(4), \text { we have, }}\end{array} \Rightarrow P \Delta V=R \Delta T$ Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Q. SHOW SOLUTION CBSE Class 11-Physics: Thermodynamics Problem's: Questions Doorsteptutor material for CBSE is prepared by world's top subject experts: fully solved questions with step-by-step explanation - practice your way to success. eSaral provides you complete edge to prepare for Board and Competitive Exams like JEE, NEET, BITSAT, etc. This is the relation between $\gamma$ and n. Hence the value of for a polyatomic gas can be determined from degree of freedom n. Q. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. , so temperature of the system (coffee) will also increase. Learn how heat energy alters physical properties of matter, such as temperature, pressure, and density. SHOW SOLUTION If you skip these chapters, you are going to be at a great loss. No, because gas does not behave like an ideal gas if $T>T_{B}$ and $T