The pressure in monoatomic gas increases linearly from ` =4xx10^(5) Nm^(-2)` to ` 8xx10^(+5) Nm^(-2)` when its volume increases from `0.2m^(3)` to `0.5m^(3)`. Calculate .
(i) Work done by the gas ,
(ii) Increase in the internal energy,
(iii) Amount of heat supplied,
(iv) Molar heat capacity of the gas `R= 8.31J mol^(-1) K^(-1)`