Acetylene (C₂H₂) Undergoes Combustion in Excess Oxygen to Generate Gaseous $\Delta$

question 12

Multiple Choice

Acetylene (C₂H₂) undergoes combustion in excess oxygen to generate gaseous carbon dioxide and water. Given $\Delta$ H ^$\circ$ _f[CO₂(g) ] = -393.5 kJ/mol, $\Delta$ H ^$\circ$ _f[H₂O(g) ] = -241.8 kJ/mol, and $\Delta$ H ^$\circ$ _f[C₂H₂(g) ] = 226.6 kJ/mol, how much energy is released (kJ) when 10.5 moles of acetylene is burned

• A) 2,510.8 kJ
• B) 26,400 kJ
• C) 13,200 kJ
• D) 52,700 kJ
• E) 9,050 kJ

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