Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-diagram based-Easy-Class 11
Consider a diagram showing a reaction vessel where iron(III) oxide reacts with dihydrogen gas under constant external pressure. Which of the following labels correctly identifies the enthalpy change of this reaction?
A
ΔrH = –33.3 kJ/mol
B
ΔrH = 0 kJ/mol
C
ΔrH = +285.83 kJ/mol
D
ΔrH = –72.79 kJ/mol
Correct Answer
Option A
Detailed Explanation
The enthalpy change for the reaction involving iron(III) oxide and dihydrogen gas is calculated as ΔfH = –33.3 kJ/mol using standard enthalpies of formation.
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