Practice question
Question
For the reaction C(s) + O₂(g) → CO₂(g), Δ H = -393.5 kJ/mol at 298 K. What is Δ U? (R = 8.314 J/mol·K)
Explanation
Δ ng = 1 - 1 = 0, RT = 2.48 kJ, Δ H = Δ U + Δ ng RT, Δ U = -393.5 - 0 = -393.5 kJ/mol.
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