Which of the following thermochemical equations is used to represent the reaction of H2(g) with O2(g) to make H2O(ℓ) giving off 572 kJ?
A) H2(g) + O2(g) H2O(ℓ) ; H = −572 kJ
B) H2(g) + O2(g) 2H2O(ℓ) ; H = +572 kJ
C) H2(g) + O2(g) 2H2O(ℓ) ; H = −286 kJ
D) 2H2(g) + O2(g) 2H2O(ℓ) ; H = −572 kJ
E) 2H2(g) + 2O2(g) 4H2O(ℓ) ; H = −286 kJ
Correct Answer:
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