# NEET Physics Thermodynamics Questions Solved

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio Cp/Cv for the gas is

(1) $\frac{3}{2}$

(2) $\frac{4}{3}$

(3) 2

(4) $\frac{5}{3}$

(1) Given $P\propto {T}^{3}$, but we know for an adiabatic process, the pressure $P\propto {T}^{\gamma /\gamma -1}$

So $\frac{\gamma }{\gamma -1}=3⇒\gamma =\frac{3}{2}⇒\frac{{C}_{P}}{{C}_{V}}=\frac{3}{2}$

Difficulty Level:

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