Calculate the change in Gibbs free energy for each of the following sets of ΔHrxn, ΔSrxn, and T.
Part A
ΔH∘rxn= 90. kJ , ΔSrxn= 152 J/K , T= 303 K
Express your answer using two significant figures.


ΔG =  kJ 
Part B
ΔH∘rxn= 90. kJ , ΔSrxn= 152 J/K , T= 750 K
Express your answer using two significant figures.


ΔG =  kJ 
Part C
ΔH∘rxn= 90. kJ , ΔSrxn=− 152 J/K , T= 303 K
Express your answer using two significant figures.


ΔG =  kJ 
Part D
ΔH∘rxn=− 90. kJ , ΔSrxn= 152 J/K , T= 407 K
Express your answer using two significant figures.


ΔG = 
kJ 
Part A
ΔG∘ = ΔH∘TΔS∘
ΔH∘rxn= 90. kJ , ΔSrxn= 152 J/K , T= 303 K
So ΔG∘ = = 90 X 1000 J  303 X 152 = 43944 = 43.94 KJ
Part B
ΔG∘ = ΔH∘TΔS∘
ΔH∘rxn= 90. kJ , ΔSrxn= 152 J/K , T= 750 K
ΔG∘ = 90 X 1000  750 X 152 = 24000 Joules = 24.00 KJ
PArt C
ΔG∘ = ΔH∘TΔS∘
ΔH∘rxn= 90. kJ , ΔSrxn=− 152 J/K , T= 303 K
ΔG∘ = 90 X1000  303 (152) = 136056 J = 136.06 KJ
Part D
ΔG∘ = ΔH∘TΔS∘
ΔH∘rxn=− 90. kJ , ΔSrxn= 152 J/K , T= 407 K
ΔG∘ = 90 X 1000  407 (152) = 151864 J = 151.86 KJ
Get Answers For Free
Most questions answered within 1 hours.