At Constant Pressure,the Combustion of 20 $\mathrm { mol } ^ { - 1 }$

question 23

Multiple Choice

At constant pressure,the combustion of 20.0 g of C₂H₆(g) releases 1036 kJ of heat.What is ?H for the reaction given below?
2C₂H₆(g) + 7O₂(g) ? 4CO₂(g) + 6H₂O(l)

• A)-173 kJ \(\mathrm { mol } ^ { - 1 }\)
• B)-779 kJ \(\mathrm { mol } ^ { - 1 }\)
• C)-1560 kJ \(\mathrm { mol } ^ { - 1 }\)
• D)-3120 kJ \(\mathrm { mol } ^ { - 1 }\)

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