Question

21. Two specific heats of a perfect gas are related by....
(A) Cp-Cv = R/J
(B) Cp-Cv=J
(C) Cp-Cy=RJ
(D) Cp-Cv=RJ​

Answer 1

Answer:

(b) cp - c y= RJ

Explanation:

When CP and CV are given calorie and R is Joule then CP - CV = ( R / J )

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Answer 2

Answer:

The correct answer is Option A

Explanation:

There are two specific heats of gases- Specific Heat at Constant Pressure (Cp) and Specific Heat at Constant Volume (Cv). Heat supplied at constant pressure is used up in two ways: (a) for doing work in expansion and (b) for raising the temperature by 1o C, while at constant volume heat supplied is used only for rise of temperature. Therefore, Cp is always greater than Cv. They are related as: $Cp-Cv = \frac{R}{J}$. This relation is called Mayer’s Relation.