An ideal gas in a frictionless piston–cylinder device doubles its volume while its…
CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics
Problem
An ideal gas in a frictionless piston–cylinder device doubles its volume while its temperature remains constant because it absorbs heat from an external reservoir. Which statement best describes the signs of q and w for the gas and classifies the overall process?
(a) q is positive and w is positive; the process is endothermic.
(b) q is zero and w is negative; the process is neither endothermic nor exothermic.
(c) q is positive and w is negative; the process is endothermic.
(d) q is negative and w is positive; the process is exothermic.