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Calculate the heat absorbed by a system in going through the cyclic process shown in the given figure.

(Take π=3.14)

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Important Questions on Thermodynamics

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Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 10
A gas undergoes a change of state during which 100 J of heat is supplied to it and it does 20 J of work. The system is brought back to its original state through a process during which 20 J of heat is rejected by the gas. Find the work done by the gas in the second process in joules.
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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 11
Temperature of 1 mole of an ideal gas is increased from 300 K to 310K under isochoric process. Heat supplied to the gas in this process is 25R. What amount of work (in joules) has to be done by the gas if temperature of the gas decreases from 310 K to 300 K adiabatically?
(Given; Gas constant R=8.3 J/mol-K)
HARD
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IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 12
A sample of an ideal gas is taken through a process ABCD. It absorbs 50 J of energy during the process AB which is an isometric process, no heat during BC and it rejects 70 J of heat during isobaric process CD. It is also given that 40 J of work is done on the gas during the process BC. Internal energy of gas in state A is 1500 J. Find the internal energy of gas in state C in joules.
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Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 13
A gas consisting of monatomic molecules (degrees of freedom =3) was expanded in a polytropic process so that the rate of collisions of the molecules against the vessel's wall did not change. Find the molar heat capacity of the gas in the process, in J mol-1K-1. (Given: Gas constant R=8.3 J mol-1K-1)
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Physics
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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 14
A gas consisting of rigid diatomic molecules was expanded ma polytropic process so that the rate of collisions of the molecules against the vessel's wall did not change. Find the molar heat capacity of the gas in this process in J/mol-K. (Given: Gas constant R=8.3 J/mol-K)
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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 15
A vertically oriented cylindrical vessel containing oxygen gas and closed by a piston of mass 50 kg. Piston can slide smoothly in the cylinder. Its cross-sectional area is 100 cm2 and atmospheric pressure is 105 Pa. Some heat is supplied to the cylinder, so that the piston is slowly displaced up by 20 cm. Find the amount of heat supplied to the gas (in Joules).
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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Archives>Q 1
Two moles of helium gas are taken over the cycle ABCDA, as shown in below in P-T diagram.
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Assuming the gas to be ideal, the work done on the gas in taking it from A to B is
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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Archives>Q 2

Two moles of helium gas is taken over the cycle ABCDA, as shown in the P-T diagram.

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The work done on the gas in taking it from D to A is