2解:
L
T
A+L
A+B
B+L
A xB B
(1)Pb-Hg(aPb=0.0150)|Pb(NO3)2(aPb2 )|Pb-Hg(aPb=0.000500)Pb-Hg(aPb=0.0150) Pb-Hg(aPb=0.000500) E
)P 1.47 10 4V/K T
E
(3)W= G=-8.5 103J Q=ZFT()P 8.45 103J
T(2)E=0.044V,(
北航2009年硕士研究生入学考试试题答案参考
一. 选择题
1.D 2.B 3.A 4.C 5.C 6.B 7.B 8.A 9.C 10.B 11.B 12.D 13.C 14.A 15.A 16.B 17.D
二.解:设计可逆过
S
25℃, C2H5OH(l) 25℃,C2H5OH(g)
△S1 △S3
S2
78.4℃, C2H5(l) 78.4℃,C2H5OH(g)
78.4℃下
1
fH( 271.74kJ mol 1mC2H5OH(l))= fHm Cp,m T=-277.69+111.46 (78.4-25.0)/1000kJ mol 1 fH( 231.61kJ mol 1mC2H5OH(g))= fHm Cp,m T=-235.10+65.44 (78.4-25.0)/1000kJ mol 1则78.4℃下 vapHm B fH 40.13kJ mol 1m 231.61 271.74kJ mol
40130-1
Jkmol 1 114.20Jk-1mol 1
T351.4351.4Cp,mdT351.4-1
S1= 111.46 lnJkmol 1 18.37Jk-1mol 1
298T298298Cp,mdT298 S3= 65.44 lnJk-1mol 1 10.79Jk-1mol 1
351.4T351.4
25℃时 S S1+ S2 S3 121.78Jk-1mol 1 S2=
=
vapHm