10. a cylinder with a movable piston contains 4.00 l of a gas at 30°c and 5.00 bar. the pistonis slowly moved to compress the gas to 8.00 bar. a) considering the system to be the gas in the cylinder and neglecting potential energy(pe), write and simplify the closed-system energy balance. do not assume that theprocess is isothermal. b) suppose the process is carried out isothermally, and the compression work done onthe gas equals 7.65 l-bar, if the gas is such that the internal energy is a function ofonly temperature, how much heat (in j) is transferred to or from (state which) thesurroundings