a better calculation method (2)another way to calculate W=△U=2CdT C(2-7)(设G与7无关) This equation is true for all adiabatic expansions or contractions involving a perfect gas or not, reversible or not 4上-内容下一内容令回主目录 返回 2021/223上一内容 下一内容 回主目录 返回 2021/2/23 A better calculation method （2）another way to calculate W U =  This equation is true for all adiabatic expansions or contractions involving a perfect gas or not, reversible or not. 2 1 = ( ( ) C T T V C T V − 设 与 无关） 2 1 d T V T = C T 