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The Heat Combustion of Acetylene,C2H2(g),at 25°C Is -1299 KJ/mol Δ\Delta Hf° Values for CO2(g)and H2O(l)are -393 and -286 KJ/mol,respectively

Question 69

Multiple Choice

The heat combustion of acetylene,C2H2(g) ,at 25°C is -1299 kJ/mol.At this temperature, Δ\Delta Hf° values for CO2(g) and H2O(l) are -393 and -286 kJ/mol,respectively.Calculate Δ\Delta Hf° for acetylene.


A) 2376 kJ/mol
B) 625 kJ/mol
C) 227 kJ/mol
D) -625 kJ/mol
E) -227 kJ/mol

Correct Answer:

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