Thermodynamics ...

A piston filled with 0.04 mole of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0°C. As it does so, it absorbs 208 J of heat. The values of q and W for the process will be
( R = 8.314 J / mol K, In 7.5 = 2.01)

Based on the first law of thermodynamics, which one of the following is correct ?

At 27° C one mole of an ideal gas is compressed isothermally and reversible from a pressure of 2 atm to 10 atm. The value of ∆ E and q are (R = 2 cal)

The internal energy changes when a system goes from state A to B is 40 kJ / mol. If the system goes from A to B by a reversible path and returns to state A by an irreversible path, what would be the net change in internal energy ?

A gas expands isothermally against a constant external pressure of 1 atm from a volume of 10 dm³ to a volume of 20 dm³. It absorbs 800 J of thermal energy from its surroundings. The ∆U is