Styrene, C₈H₈, Is One of the Substances Used in the Production

question 45

Multiple Choice

Styrene, C₈H₈, is one of the substances used in the production of synthetic rubber. When styrene burns in oxygen to form carbon dioxide and liquid water under standard-state conditions at 25°C, 42.15 kJ are released per gram of styrene. Find the standard enthalpy of formation of styrene at 25°C. ΔH°_f(CO₂(g) ) = -393.5 kJ/mol, ΔH°_f(H₂O(l) ) = -285.8 kJ/mol

• A) -4390 kJ/mol
• B) -1044 kJ/mol
• C) -8681 kJ/mol
• D) +99 kJ/mol
• E) +637 kJ/mol

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