The change in the magnitude of the volume of an ideal gas when a...

$PV = nRT$

$P \Delta V + V \Delta P = 0$

$\Delta V = - \dfrac{\Delta P}{P}V . . . . ( i )$

In second case

$P \Delta V = - nR \Delta T$

$\Delta V = - \dfrac{nR \Delta T}{P} . . . ( ii )$

equating $( i )$ and $( ii )$

$\dfrac{nR \Delta T}{P} = - \dfrac{\Delta P}{P}V$

$\Delta T = \Delta P\dfrac{V}{nR}$

$c = \dfrac{v}{nR}$

Putting the value of $V, n$ and $R, C = 150$