物理化学求熵变在隔离容器中,把25g50摄氏度的乙醇倒入70g10摄氏度的乙醇中,Cpm+111.5,求熵变原题如下Calculate the change in entropy when 25g ofethanol at 50℃ is poured into 70g ethanol at 10℃ in an insulated vessel,g
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![物理化学求熵变在隔离容器中,把25g50摄氏度的乙醇倒入70g10摄氏度的乙醇中,Cpm+111.5,求熵变原题如下Calculate the change in entropy when 25g ofethanol at 50℃ is poured into 70g ethanol at 10℃ in an insulated vessel,g](/uploads/image/z/6356705-41-5.jpg?t=%E7%89%A9%E7%90%86%E5%8C%96%E5%AD%A6%E6%B1%82%E7%86%B5%E5%8F%98%E5%9C%A8%E9%9A%94%E7%A6%BB%E5%AE%B9%E5%99%A8%E4%B8%AD%2C%E6%8A%8A25g50%E6%91%84%E6%B0%8F%E5%BA%A6%E7%9A%84%E4%B9%99%E9%86%87%E5%80%92%E5%85%A570g10%E6%91%84%E6%B0%8F%E5%BA%A6%E7%9A%84%E4%B9%99%E9%86%87%E4%B8%AD%2CCpm%2B111.5%2C%E6%B1%82%E7%86%B5%E5%8F%98%E5%8E%9F%E9%A2%98%E5%A6%82%E4%B8%8BCalculate+the+change+in+entropy+when+25g+ofethanol+at+50%E2%84%83+is+poured+into+70g+ethanol+at+10%E2%84%83+in+an+insulated+vessel%2Cg)
物理化学求熵变在隔离容器中,把25g50摄氏度的乙醇倒入70g10摄氏度的乙醇中,Cpm+111.5,求熵变原题如下Calculate the change in entropy when 25g ofethanol at 50℃ is poured into 70g ethanol at 10℃ in an insulated vessel,g
物理化学求熵变
在隔离容器中,把25g50摄氏度的乙醇倒入70g10摄氏度的乙醇中,Cpm+111.5,求熵变
原题如下
Calculate the change in entropy when 25g ofethanol at 50℃ is poured into 70g ethanol at 10℃ in an insulated vessel,given that Cp,m=111.5J*K-1*mol-1
答案是0.2 可是我算了好久都不对,求帮忙
物理化学求熵变在隔离容器中,把25g50摄氏度的乙醇倒入70g10摄氏度的乙醇中,Cpm+111.5,求熵变原题如下Calculate the change in entropy when 25g ofethanol at 50℃ is poured into 70g ethanol at 10℃ in an insulated vessel,g
体系为不可逆的等压过程,设平衡温度为T
根据能量守恒:
25g÷46g/mol ×Cpm×(323K-T)=70g÷46g/mol ×Cpm×(T-283K)
解得 T=293.5K
n1=25g/46g/mol=0.543mol T1=323K
n2=70g/46g/moL=1.522mol T2=283K
T=293.5K
⊿S1=0.543mol×111.5J*K-1*mol-1×ln293.5/323K=-5.8J/K
⊿S2=1.522mol×111.5J*K-1*mol-1×ln293.5/283K=+6.2J/K
⊿S=0.4J/K