Example 15.2 0.5 kmol monatomic ideal gas,first reversible and adiabatic expansion from25℃，2m3→1atm,then isothermally reversible compression to 2 m3. 1)Plot the p-v diagram; 2)determine the overall Q,W,△U,and△H. Solution: 1) 1at V 上游充通大学 March 23,2018 13 SHANGHAI JLAO TONG UNIVERSITYMarch 23, 2018 13 0.5 kmol monatomic ideal gas, first reversible and adiabatic expansion from 25 ℃, 2m3 1 atm, then isothermally reversible compression to 2 m3 . 1)Plot the p-v diagram; 2)determine the overall Q, W, ΔU, and ΔH . Solution: 1) Example 15.2