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Q. If quantity of heat 1163.4 J supplied to one mole of nitrogen gas, at room temperature at constant pressure, then the rise in temperature is

KEAMKEAM 2008Kinetic Theory

Solution:

Heat given to the gas at room temperature and at constant temperature.
Q = $ n C_p \triangle \, T $
$\therefore 1163.4 = 1 \times \frac{ 7}{2} R \times \triangle T $
$ $ $ ( \because C_p = \frac{ 7}{2}$ R for diatomic gas)
or $ \triangle T = \frac{ 2 \times 1163.4 }{ 7 \times 8.31 } $
$ $ $ ( \because R = 8.31 \, J \, mol^{-1} \, K^{ - 1} )$
or $ \triangle T = 40 K $