NEET Physics Thermodynamics Questions Solved


Work done by a system under isothermal change from a volume V1 to V2 for a gas which obeys Vander Waal's equation (Vβn)P+αn2V=nRT

(1) nRTlogeV2nβV1nβ+αn2V1V2V1V2

(2) nRTlog10V2αβV1αβ+αn2V1V2V1V2

(3) nRTlogeV2nαV1nα+βn2V1V2V1V2

(4) nRTlogeV1nβV2nβ+αn2V1V2V1V2

(1) According to given Vander Waal’s equation

P=nRTVnβαn2V2

Work done, W=V1V2PdV=nRTV1V2dVVnβαn2V1V2dVV2

=nRT[loge(Vnβ)]V1V2+αn21VV1V2

=nRTlogeV2nβV1nβ+αn2V1V2V1V2

Difficulty Level:

  • 36%
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