1.30度C定溫下，一理想氣體由最初壓力2.50atm及體積3.00L 膨脹至最終壓力1.50atm及體積5.00L，試計算氣體所做最大功． Ans:-0.388J 這一題我的算法是W=-PΔV=-1.5*2*101.32=303.96J，請問是不是答案問題? ========================================== 2.A sample of an ideal gas is expanded reversibly at a constant temperature of 25度C from an initial pressure of 4.00atm and a volume of 250.0ml to a final pressure of 1.00atm. Caculate W. Ans:W=-140J 這題好像是等溫可逆膨脹，所以我用W=-nRTIn(V2/V1)但題目沒給n? 所以我用W=-PΔV=-1*(4.0.25/1-0.25)=-0.75*101.32=75.99J 感謝各位看完我的問題，還請各位賜教