At 25°C,the Standard Enthalpy of Combustion of Gaseous Propane (C₃H₈)is

question 66

Multiple Choice

At 25°C,the standard enthalpy of combustion of gaseous propane (C₃H₈) is -2219.0 kJ per mole of propane,and the standard enthalpy of combustion of gaseous propylene (C₃H₆) is -2058.3 kJ per mole of propylene.What is the standard enthalpy change for the following reaction at 25°C?
C₃H₆(g) + H₂(g) → C₃H₈(g)
Substance
ΔH°_f (kJ/mol)
CO₂(g)
-393.5
H₂O(l)
-285.8

• A)+104.7 kJ
• B)-20.4 kJ
• C)-125.1 kJ
• D)+160.7 kJ
• E)-160.7 kJ

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