1.

When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the intermal energy of gas is:

Answer»

`(5)/(7)`
`(3)/(7)`
`(3)/(5)`
`(2)/(5)`

SOLUTION :Here increase in internal energy.
`Delta U =n C_(v)dT`.
Heat supplied at CONSTANT pressure.
`Delta Q =n C_(P)dT`.
`therefore (Delta U)/(Delta Q)=(C_(v))/(C_(P))=(1)/(gamma) =(1)/(7//5)=(5)/(7)`
Thus, correct choice is (a).


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