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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Kinetic Theory of Gases
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The reason why $Cp$ is greater than $Cv$ is _______

(A)The temperature rise while heating at constant pressure is less (B) At constant volume, no work is done. (C) At constant pressure, no work is done. (D)none of these

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Since $\Delta Q =\Delta u+ \Delta w$ and at constant volume, $\Delta w=0$ , So Cv accounts only for the heat given i raising internal energy whereas $C_p$ accounts for the heat which raises internal energy and accounts for work done
Hence B is the correct answer.
answered May 2, 2014 by meena.p

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