A hypothetical gas expands adiabatically such that its volume changes from 08 litres to 27 litres. If the ratio of final pressure of the gas to initial pressure of the gas is 16 81 . Then the ratio of C p C v will be.

Step-by-step solution

Let γ be the ratio of C p C v . Then for adiabatic process P V γ   = Constant ⇒ P i P f = V f V i γ ⇒ 81 16 = 27 8 γ ⇒ 3 2 3 4 3 = 27 8 γ ⇒ γ = 4 3