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

question 84

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 ^$\circ$ C, 42.62 kJ are released per gram of styrene. Find the standard enthalpy of formation of styrene at 25 ^$\circ$ C.(Given: $\Delta$ H ^$\circ$ _f[CO₂(g) ] = -393.5 kJ/mol, $\Delta$ H ^$\circ$ _f[H₂O(l) ] = -285.8 kJ/mol, $\Delta$ H ^$\circ$ _f[H₂O(g) ] = -241.8 kJ/mol)

• A) 147.8 kJ/mol
• B) 323.8 kJ/mol
• C) ~636.7 kJ/mol
• D) ~4249 kJ/mol
• E) ~8730 kJ/mol

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