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

Options

A. `2//5`
B. `3//5`
C. `3//7`
D. `3//4`

Answer

B

Explanation

`Q_(1) = mC_(P)dT` at constant pressure
`Q_(2)`= Heat for internal energy =`mC_(v)dT`
`:. (Q_2)/(Q_1) = (C_v)/(C_P) = 1/(gamma) = 1/(5//3) = 3//5` for monoatomic gas.