An ideal monatomic gas goes from state A ($2 \times 10^{-3}\ \text{m}^3$, $3 \times 10^5\ \text{Pa}$) to state B ($5 \times 10^{-3}\ \text{m}^3$, $1 \times 10^5\ \text{Pa}$) along the straight line shown in the pressure-volume diagram. The work done by the gas, and the heat it absorbs, are

Fig. 1: Pressure-volume diagram with a straight line from A (2 times 10 to the minus 3 cubic metres, 3 times 10 to the 5 pascal) to B (5 times 10 to the minus 3 cubic metres, 1 times 10 to the 5 pascal).