A cylinder of ideal gas is closed by an movable piston of area

PHYSICS · Subjective · A Level · Physics · Engineering physics · Engineering physics

Problem

A cylinder of ideal gas is closed by an

8\ \text{kg}

movable piston of area

60\ \text{cm}^2

. The atmospheric pressure is

100\ \text{kPa}

. When the gas is heated from

30^\circ\text{C}

100^\circ\text{C}

, the piston rises

20\ \text{cm}

. The piston is then fastened in place and the gas is cooled back to

30^\circ\text{C}

. If

\Delta Q_1

is the heat added to the gas during heating and

\Delta Q_2

is the heat lost during cooling, find the difference.