A gas under constant pressure of 45×10^5pa when subjected to 800 kj of heat, changes the volume from 0.5m^3 to 2.0m^3 . The change in internal energy of the gas is A gas under constant pressure of 45×10^5pa when subjected to 800 kj of heat changes the volume from 0.5m^3 to 2.0m^3 . The change [...]