A gas under constant pressure of 4.5 * 10^5 Pa, when subjected to 800 kJ of heat, changes the volume from 0.5 m^3 to 2.0 m^3. The change in internal energy of the gas is A gas under constant pressure of 4.5 * 10^5 Pa changes the volume from 0.5 m^3 to 2.0 m^3. The [...]