Calculate the Enthalpy of Reaction for H₂(g) + C₂H₄(g) $\rarr$ C₂H₆(g) $\Delta$

question 48

Multiple Choice

Calculate the enthalpy of reaction for H₂(g) + C₂H₄(g) $\rarr$ C₂H₆(g) .[ $\Delta$ H ^$\circ$ _f(C₂H₄(g) ) = 52.3 kJ/mol; $\Delta$ H ^$\circ$ _f(C₂H₆(g) ) = -84.7 kJ/mol]

• A) -117 kJ/mol
• B) -127 kJ/mol
• C) -137 kJ/mol
• D) -147 kJ/mol
• E) None of the above

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