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Use the Standard Reaction Enthalpies Given Below to Determine ΔrH°

Question 56

Multiple Choice

Use the standard reaction enthalpies given below to determine ΔrH° for the following reaction: 2S(s) + 3O2(g) → 2SO3(g) ΔrH° = ?
Given:
SO2(g) → S(s) + O2(g) ΔrH° = +296.8 kJ
2SO2(g) + O2(g) → 2SO3(g) ΔrH° = -197.8 kJ


A) -494.6 kJ mol-1
B) -692.4 kJ mol-1
C) -791.4 kJ mol-1
D) 1583 kJ mol-1
E) -293.0 kJ mol-1

Correct Answer:

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