A cylinder that has an ideal piston contains one mole of hydrogen gas and undergoes an isobaric expansion that doubles its initial volume.
How much heat is transferred to or from the gas?
a) heat flows into the gas by an amount greater than the mechanical work W
b) heat flows into the gas by an amount less than the mechanical work W
c) heat flows out of the gas by an amount greater than the mechanical work W
d) heat flows out of the gas by an amount less than the mechanical work W