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38. If the ratio of specific heat of a gas at constant pressure

to that at constant volume is γ, the change in internal energy of a mass of gas, when the volume changes from V to 2V constant pressure p, is

(a)     R/( γ – 1)                        (b) pV

(c)   pV/  ( γ – 1)                       (d) γpV/ ( γ – 1)

Ans. c

(6)

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