Answer:
a). True
Step-by-step explanation:
Yes when a gas in a piston cylinder device is compressed and the temperature of the gas rises inside the piston cylinder, work is said to be done.
Work is nothing but the energy needed to move something by applying a force. During compression, the expression for work is given by
w = -p.ΔV
The systems internal energy decreases when work is done on the system thus increases its temperature while when the system performs a work its internal energy decreases.