Given the values of ΔH∘rxn, ΔS∘rxn, and T, determine ΔSuniv. Part A ΔH∘rxn=+84 kJ , ΔSrxn=+141 J/K , T= 308 K Express your answer as an integer. Part B ΔH∘rxn=+84 kJ , ΔSrxn=+141 J/K , T= 754 K Express your answer as an integer. Part C ΔH∘rxn=+84 kJ , ΔSrxn=− 141 J/K , T= 308 K Express your answer as an integer. Part D ΔH∘rxn=− 84 kJ , ΔSrxn=+ 141 J/K , T= 403 K Express your answer as an integer. Part E Predict whether or not the reaction in part A is spontaneous. Part F Predict whether or not the reaction in part B is spontaneous.Part G Predict whether or not the reaction in part C is spontaneous. Part H Predict whether or not the reaction in part D is spontaneous.
A)
Given:
ΔH = 84 KJ
= 8.4*10^4 J
T = 308 K
use:
ΔS Surr = -ΔH/T
= -(8.4*10^4)/308
= -2.727*10^2 J/K
ΔSuniv = ΔS Sys + ΔS Surr
= 141 J/K + -2.727*10^2 J/K
= -1.317*10^2 J/K
Answer: -132 J/K
B)
Given:
ΔH = 84 KJ
= 8.4*10^4 J
T = 754 K
use:
ΔS Surr = -ΔH/T
= -(8.4*10^4)/754
= -1.114*10^2 J/K
ΔSuniv = ΔS Sys + ΔS Surr
= 141 J/K + -1.114*10^2 J/K
= 29.59 J/K
Answer: 29.6 J/K
C)
Given:
ΔH = 84 KJ
= 8.4*10^4 J
T = 308 K
use:
ΔS Surr = -ΔH/T
= -(8.4*10^4)/308
= -2.727*10^2 J/K
ΔSuniv = ΔS Sys + ΔS Surr
= -141 J/K + -2.727*10^2 J/K
= -4.137*10^2 J/K
Answer: -414 J/K
D)
Given:
ΔH = -84 KJ
= -8.4*10^4 J
T = 403 K
use:
ΔS Surr = -ΔH/T
= -(-8.4*10^4)/403
= 2.084*10^2 J/K
ΔSuniv = ΔS Sys + ΔS Surr
= 141 J/K + 2.084*10^2 J/K
= 349 J/K
Only 4 parts at a time please
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