Multiple Choice
Consider the following changes at constant temperature and pressure:
H2O(s) → H2O(l) ; ΔH1
H2O(l) → H2O(g) ; ΔH2
H2O(g) → H2O(s) ; ΔH3
Using Hess's law,the sum ΔH1 + ΔH2 + ΔH3 is
A) equal to zero.
B) sometimes greater than zero and sometimes less than zero.
C) less than zero.
D) cannot be determined without numerical values for ΔH.
E) greater than zero.
Correct Answer:
Verified
Correct Answer:
Verified
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