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CHM 101 Thermochemistry Objective Question
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Question

For NH3(g) + HCl(g) -> NH4Cl(s), ΔH_rxn = ΔH_f(NH4Cl) - ΔH_f(NH3) - ΔH_f(HCl).
Options
A ΔH_f(NH4Cl) - ΔH_f(NH3) - ΔH_f(HCl)
Correct Answer
B ΔH_f(NH4Cl) + ΔH_f(NH3) + ΔH_f(HCl)
C ΔH_f(NH3) + ΔH_f(HCl) - ΔH_f(NH4Cl)
D ΔH_f(NH4Cl) - ΔH_f(NH3) + ΔH_f(HCl)
Correct Answer

Option A is the correct answer.

Detailed Explanation

ΔH_rxn = Σ ΔH_f°(products) - Σ ΔH_f°(reactants) = ΔH_f°(NH4Cl) - [ΔH_f°(NH3) + ΔH_f°(HCl)].

Hint

Products minus reactants.

Question Info

Course: CHM 101
Topic: Thermochemistry
Type: Objective
Difficulty: Not specified
Question 133 of 1872
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