The change in the magnitude of the volume of an ideal gas when a small additional pressure ∆P is applied at a constant temperature is the same as the change when the temperature is reduced by a small quantity ∆Tat constant pressure. The initial temperature and pressure of the gas were 300K and2atm. respectively. If ∆T=C∆Pthen the value of C in (Katm⁻¹) is __________.