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Calculations: (27 points) One mole of an monatomic ideal gas is initially at 12 bar and 298 K. It is allowed to expand against a constant external pressure of 4 bar to a final pressure of 4 bar. During this process, the temperature of the gas falls to 262 K. a. Find Δυ (6 points), ΔΗ (6 points), as (6 points).( Show your calculation) b. Draw three deferent paths in three P-V graphs, respectively, to accomplish the above thermodynamic change (Only P-V graphs and the in-graph annotations) (9 points)
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