A sample of ideal gas expands reversibly from volume V1 to V2 along two different curves that start from the same initial state. Curve X is steeper than Curve Y at all points of the expansion. Which statement about the heat interaction during the two expansions is correct?
(a) The gas absorbs equal amounts of heat along both curves
(b) The gas absorbs more heat along Curve X
(c) The gas absorbs more heat along Curve Y
(d) Along Curve X the gas rejects heat, while along Curve Y it absorbs heat