1mol范德华气体从T1、V1绝热自由膨胀至T2、V2,设容热容CV为常数,则过程的熵变为:
A: △S = CVln(T2/T1)
B: △S = nRln[(V2-b)/(V1-b)]
C: △S = CVln(T2/T1) + nRln(V2/V1)
D: △S = CVln(T2/T1) + nRln[(V2-b)/(V1-b)]
A: △S = CVln(T2/T1)
B: △S = nRln[(V2-b)/(V1-b)]
C: △S = CVln(T2/T1) + nRln(V2/V1)
D: △S = CVln(T2/T1) + nRln[(V2-b)/(V1-b)]
举一反三
- 1 mol范德华气体从T1,V1绝热自由膨胀至T2,V2,设定容热容CV为常数,则过程的熵变应 为: ( ) A: ΔS=nRln[(V2-b)/(V1-b)] B: ΔS=0 C: ΔS=CVln(T2/T1) D: ΔS=CVln(T2/T1)+nRln[(V2-b)/(V1-b)]
- 1mol范德华气体从T1、V1绝热自由膨胀至T2、V2,设容热容CV为常数,则过程的熵变为:( ) A: △S = CVln(T2/T1) B: △S = nRln[(V2-b)/(V1-b)] C: △S = CVln(T2/T1) + nRln[(V2-b)/(V1-b)] D: △S = 0
- 1mol范德华气体从T1、V1绝热自由膨胀至T2、V2,设容热容CV为常数,则过程的熵变为:( ) A: △S = CVln(T2/T1) B: △S = nRln[(V2-b)/(V1-b)] C: △S = CVln(T2/T1) + nRln[(V2-b)/(V1-b)] D: △S = 0
- 一定量的理想气体从p1,V1,T1分别经(1)绝热可逆膨胀到p2,V2,T2;(2)经绝热恒外压膨胀到p´2,V´2,T´2,若p´2=p2,那么( ) A: T´2>T2,V´2>V2 B: T´2=T2,V´2=V2 C: T´2>T2,V´2<V2 D: T´2<T2,V´2>V2
- 1mol理想气体p1,V1,T1,分别经过绝热可逆膨胀到p2,V2,T2;绝热恒外压膨胀到pˊ2,Vˊ2,Tˊ2。若p2=pˊ2则() A: Tˊ=T,Vˊ=V B: Tˊ>T,Vˊ>V C: Tˊ>T,Vˊ<V D: Tˊ<T,Vˊ>V