The combustion of 7 g of ethylene releases 350 kJ of heat. Determine the thermal effect of the reaction.
| May 1, 2021 | education
C2H4 + 3O2 = 2CO2 + 2H2O
Let’s find the amount of ethylene substance:
n (C2H4) = m (C2H4) / M (C2H4) = 7/28 = 0.25 mol;
Let’s find the amount of heat released during the combustion of 1 mol of ethylene:
Q = 350 / 0.25 = 1400 kJ / mol.
Answer: the thermal effect of the reaction is 1400 kJ / mol.
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