Problem

A gas in a cylinder is held at a constant pressure of

2.30 \times 10^5\text{ Pa}

and is cooled and compressed from

1.70\text{ m}^3

1.20\text{ m}^3

. The internal energy of the gas decreases by

1.40 \times 10^5\text{ J}

. (a) Find the work done by the gas. (b) Find the absolute value

|Q|

of the heat flow into or out of the gas and state the direction of the heat flow. (c) Does it matter whether or not the gas is ideal? Why or why not?