The change in the magnitude of the volume of an ideal gas when a small additional pressure $\Delta \mathrm { P }$ is applied at a constant temperature, is the same as the change when the temperature is reduced by a small quantity $\Delta \mathrm { T }$ at constant pressure. The initial temperature and pressure of the gas were 300 K and 2 atm respectively. If $| \Delta \mathrm { T } | = \mathrm { C } | \Delta \mathrm { P } |$ then value of C in (K/atm) is $\_\_\_\_$