ThermodynamicsHard
Question
Calculate ᐃfGo for (NH4CI, s) at 310 K.
Given : ᐃfHo (NH4CI, s) = - 314.5 kJ/mol; ᐃrCp = 0
SoN2(g) = 192 JK-1 mol-1; SoH2(g) = 130.5 JK-1 mol-1;
All given data are at 300 K.
Given : ᐃfHo (NH4CI, s) = - 314.5 kJ/mol; ᐃrCp = 0
SoN2(g) = 192 JK-1 mol-1; SoH2(g) = 130.5 JK-1 mol-1;
All given data are at 300 K.
Options
A.-198.56 kJ/mol
B.-426.7 kJ/mol
C.-202.3 kJ/mol
D.None of these
Solution
ᐃfSo(NH4CI,s) at 300 K (300 K ᐃfSo(NH4CI,s))
= SoNH4Cl(s) -
= - 374 JK-1 mol-1
ᐃfCP = 0
∴ ᐃfSo310 = ᐃfSo300
= - 374 JK-1 mol-1
ᐃrHo310 = ᐃrHo300 = - 314.5
ᐃfGo310 = ᐃfHo - 310ᐃSo = - 314.5 -
= - 198.56 kJ/mol.
= SoNH4Cl(s) -
= - 374 JK-1 mol-1
ᐃfCP = 0
∴ ᐃfSo310 = ᐃfSo300
= - 374 JK-1 mol-1
ᐃrHo310 = ᐃrHo300 = - 314.5
ᐃfGo310 = ᐃfHo - 310ᐃSo = - 314.5 -
= - 198.56 kJ/mol.Create a free account to view solution
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