Question

1 mole of a monoatomic and 2 mole of diatomic gas are mixed, Now the resulting gas is taken through a process in which molar heat capacity was found 3R. Polytropic constant in the process is –

• A. $- \frac{1}{5}$
• B. $\frac{1}{5}$
• C. $\frac{2}{5}$
• D. None of these

Answer 1

Answer: (A)

$- \frac{1}{5}$

Answer 2

C = Cv_mix + $\frac{R}{1 - n}$; Cv_mix = $\frac{n_{1}Cv_{1} + n_{2}Cv_{2}}{n_{1} + n_{2}}$