1.

When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas, is [IIT 1990; UPSEAT 1998; RPET 2000]

A.            \[\frac{2}{5}\]                      
B.            \[\frac{3}{5}\]
C.            \[\frac{3}{7}\]                      
D.            \[\frac{5}{7}\]
Answer» E.


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