Post Utme Pan Atlantic University 2025 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2025 Post Utme Pan Atlantic University Chemistry examination.

Post Utme Pan Atlantic University 2025 Chemistry Objective / Multiple Choice
Question 20 POST_UTME_PAN-ATLANTIC_UNIVERSITY • 2025 • CHEMISTRY • objective

The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. Calculate the s\tandard enthalpy of formation of CO(g) and O2(g) from their elements in their s\tandard states.

Answer Options

Correct Answer A. ΔH^∘_f(CO(g)) = -110.5 kJ/mol, ΔH^∘_f(O2(g)) = 0 kJ/mol
B. ΔH^∘_f(CO(g)) = -110.5 kJ/mol, ΔH^∘_f(O2(g)) = -248.2 kJ/mol
C. ΔH^∘_f(CO(g)) = -110.5 kJ/mol, ΔH^∘_f(O2(g)) = 248.2 kJ/mol
D. ΔH^∘_f(CO(g)) = 110.5 kJ/mol, ΔH^∘_f(O2(g)) = 248.2 kJ/mol
Correct Answer
A
Correct Option:
ΔH^∘_f(CO(g)) = -110.5 kJ/mol, ΔH^∘_f(O2(g)) = 0 kJ/mol

About This Question

This is Post Utme Pan Atlantic University 2025 Chemistry Question 20. It is one of the objective questions from the 2025 Post Utme Pan Atlantic University Chemistry examination.

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