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39. If

Cv = 4.96 cal/mole K, then increase in internal energy when temperature of 2 moles of this gas is increased from  340 K to 342 K

(a)  27.80 cal                           (b)  19.84 cal

(c)   13.90 cal                            (d)  9.92 cal

Ans. b

(38)

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