The First Law can be expressed as the change in internal energy of a system equals the amount of energy added to a system (Q), such as heat, minus the work expended by the system on its surroundings (W).. Thermodynamics Resources Videos. During another process it does 25J of work and its temperature decreases by 5K. As a result, the internal energy of the gas: The internal energy of an ideal gas depends upon, Thermodynamics is concerned in part with transformations between, 110 joules of heat is added to a gaseous system, whose internal energy is 40J; then the amount of external work done is, The change in internal energy of a thermo- dynamical system which has absorbed 2 kcal of heat and done 400 J of work is \[(1\text{ }cal=4.2J)\], If the amount of heat given to a system is 35 J and the amount of work done on the system is 15 J, then the change in internal energy of the system is, A perfect gas goes from a state A to another state B by absorbing \[8\times {{10}^{5}}J\] of heat and doing \[6.5\times {{10}^{5}}J\] of external work. The change in internal energy due to evaporation of 1 gm of water is. An ideal gas has temperature\[{{T}_{1}}\], at the initial state shown in the P- V diagram. CREATE AN ACCOUNT Create Tests & Flashcards. For an ideal gas graph is shown for three processes, Process 1, 2 and 3 are respectively. The correct P-F diagram representing the two processes is: question_answer42) One mole of an ideal gas at an initial temperature of T K does 6R joules of word adiabatically. | It is found that work done on the gas is 70% higher than what would be on an ideal gas. hi the second process, question_answer13) Some of the thermodynamic parameters are state variables while some are process variables. Sample Papers https://www.studyadda.com An inventor claims its efficiency to be 26%, then: A steam engine takes 0.1 kg of steam at \[100{}^\circ C\] per minute and cools it down to \[20{}^\circ C.\]What is the heat rejected by the steam engine per second? Solved Papers (1) Heat \[\mathbf{(\Delta Q)}\]: It is the energy that is transferred between a system and its environment because of the temperature difference between them. All the topics of Heat and Thermodynamics have been prepared in accordance with the elite exams like IIT JEE (Main and Advanced). From a general summary to chapter summaries to explanations of famous quotes, the SparkNotes Introduction to Thermodynamics Study Guide has everything you … If such a gas at initial temperature T is adiabatically compressed to half the initial volume, its final temperature will be. Physics the study of matter, motion, energy, and force. In a thermodynamic process, pressure of a fixed mass of gas is changed in such a manner that the gas molecules gives out 30 joules of heat and 10 J of work is done on the gas. Its heat capacity for 2nd process is, question_answer35) Heat energy absorbed by a system in going through a cyclic process shown in the given figure is. What will be the final pressure if an ideal gas in a cylinder is compressed adiabatically to \[\frac{1}{3}rd\] of its volume? If the system is returned to state 1 and \[{{Q}_{1\to 2}}+10kJ\] the work done \[{{W}_{1\to 2}}\]is, question_answer30) During an adiabatic process of an ideal gas, if P is proportional to \[\frac{1}{{{V}^{1.5}}}\], then the ratio of specific heat capacities at constant pressure to that at constant volume for the gas is. A thermodynamic system undergoes cyclic process ABCDA as shown in fig. OTP has been sent to your mobile number and is valid for one hour If the pressure in the state B is \[{{P}_{0}}/2\] then the pressure of the gas in state C is, question_answer52) Certain perfect gas is found to obey \[P{{V}^{3/2}}=\] constant during an adiabatic process. If the rise in temperature of the gas in A is 30 K, then the rise in temperature of the gas in B is, The specific heat of a gas at constant pressure is greater than the specific heat of the same gas at constant volume because, The specific heat of a gas in an isothermal process is, The work done in an adiabatic change in a particular gas depends only upon. Process 1 is isobaric process, process 2 is isothermal and process is adiabatic. In particular, it describes how thermal energy is converted to and from other forms of energy and how it affects matter. The cycle consists of three steps: (i) an isothermal expansion \[(a\to b),\] (ii) an isobaric compression \[(b\to c),\] and (iii) a constant volume increases in pressure \[(c\to a).\] If \[{{T}_{a}}=400K,\] \[{{P}_{a}}=4atm,\]and \[{{P}_{b}}={{P}_{c}},=1atm,\] the work done by the gas per cycle is, question_answer55) A 500 ml sealed cylinder contains nitrogen at a pressure of 1 atm. If the tyre bursts suddenly at temperature 300 K, what will be the new temperature? It is found that work done on the gas is 70% higher than what would be on an ideal gas. question_answer27) What will be the final pressure if an ideal gas in a cylinder is compressed adiabatically to \[\frac{1}{3}rd\] of its volume? Thermodynamics, science of the relationship between heat, work, temperature, and energy. The value of \[\frac{{{V}_{a}}}{{{V}_{c}}}\] will be, A diatomic ideal gas undergoes a thermodynamic change according to the P-V diagram shown in the figure. Notes Physics Notes , Physics Assignment , Physics Quiz , HC Verma Solution , NCERT Solution. Thermodynamics is a branch of physics which deals with the energy and work of a system. question_answer76) Suppose 0.5 mole of an ideal gas undergoes an isothermal expansion as energy is added to its heat Q. Graph shows the final volume \[{{V}_{f}}\] versus Q. [Given \[{{(3)}^{5/3}}=\text{ }6.19\]]. Refund Policy, You need to login to perform this action.You will be redirected in | The glass tube is broken so that hydrogen also fills the cylinder. Its volume is 0.50 ml and it contains hydrogen at a pressure of 4.5 atm. View Study Package on Thermodynamics.pdf from PHYSICS 32003 at National University. The temperature of gas at c and d are 300 K and 500 K. calculate the heat absorbed by the gas during the process. The gas is allowed to expand adiabatically to a temperature \[{{T}_{2}}\,\] by releasing the piston suddenly. Privacy Policy Amazing Facts About 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. This implies that, A mass of diatomic gas \[(\gamma =1.4)\]at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from \[27{}^\circ C\] to \[927{}^\circ C\]. The work done by the system in the cycle is. The amount of heat supplied to the gas in the process 1, 2, 3 and 4 are \[{{Q}_{1}}\], \[{{Q}_{2}}\], \[{{Q}_{3}}\] and \[{{Q}_{4}}\] respectively, then correct order of heat supplied to the gas is [AB is process-1, AC is process-2, AD is adiabatic process-3 and AE is process-4]. Then. question_answer47) There are two processes ABC and DBF. Fluid dynamics and thermodynamics are branches of physics that deal with behavior. The pressure-volume diagram shows six curved paths that can be followed by the gas (connected by vertical paths). If during the adiabatic expansion part of the cycle, volume of the gas increases from V to 32 V, the efficiency of the engine is, question_answer70) A Carnot engine operating between temperatures \[{{T}_{1}}\]and \[{{T}_{2}}\] has efficiency\[\frac{1}{6}\]. The amount of heat supplied to the gas in the process 1, 2, 3 and 4 are \[{{Q}_{1}}\], \[{{Q}_{2}}\], \[{{Q}_{3}}\] and \[{{Q}_{4}}\] respectively, then correct order of heat supplied to the gas is [AB is process-1, AC is process-2, AD is adiabatic process-3 and AE is process-4]. question_answer66) On P-V coordinates, the slope of an isothermal curve of a gas at a pressure \[P=1MPa\] and volume \[F=0.0025{{m}^{3}}\] is equal to\[-400\text{ }MPa/{{m}^{3}}\] . The initial pressure and volume of the gas are \[{{10}^{5}}N/{{m}^{2}}\] and 6 liter respectively. The pressure of the gas in final state is. The work done by gas in going from state B to C is double the work done by gas in going from state A to B. The gas has a higher ternperature \[\,{{T}_{2}}\] at the final states a and b, which it can reach the paths shown. | The key concept is that heat is a form of energy corresponding to a definite amount of mechanical work. As a result, the internal energy of the gas: question_answer7) The internal energy of an ideal gas depends upon, question_answer8) Thermodynamics is concerned in part with transformations between, question_answer9) 110 joules of heat is added to a gaseous system, whose internal energy is 40J; then the amount of external work done is, question_answer10) The change in internal energy of a thermo- dynamical system which has absorbed 2 kcal of heat and done 400 J of work is \[(1\text{ }cal=4.2J)\], question_answer11) If the amount of heat given to a system is 35 J and the amount of work done on the system is 15 J, then the change in internal energy of the system is, question_answer12) A perfect gas goes from a state A to another state B by absorbing \[8\times {{10}^{5}}J\] of heat and doing \[6.5\times {{10}^{5}}J\] of external work. The volume changes from \[2\times {{10}^{-3}}{{m}^{3}}\] to \[3.34{{m}^{3}}.\]The work done by the system is about. 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