AIPMT PRELIMS2006Chemistry-Thermodynamics
AIPMT PRELIMS 2006 Chemistry Enthalpy and Internal Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Assume each reaction is carried out in an open container. For which reaction will ΔH = ΔE?
A
H₂(g) + Br₂(g) → 2HBr(g)
B
C(s) + 2H₂O(g) → 2H₂(g) + CO₂(g)
C
PCl₅(g) → PCl₃(g) + Cl₂(g)
D
2CO(g) + O₂(g) → 2CO₂(g)
Correct Answer
Option A
Detailed Explanation
In an open container, ΔH = ΔE when there is no change in the number of moles of gas. Reaction A has no change in moles of gas.
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