7. Figure 2.15 shows that when one mole of an ideal monatomic gas is allowed to expand adi- abatically and reversibly from 22.7 L mol-1 at 1 bar and 0°C (at point A on the graph) to a volume of 45.4 L mol" (at point C), the pressure drops to 0.315 bar. Confirm this pressure and calculate the temperature at C. How much work is done in the adiabatic expansion? Y = RR P2 = P1 T₂ T₁ 2 W= T Tv dT = R(T2-TI)