0.46g of ethanol when burned raised the temperature of 50g of water by 14.3K. Calculate the heat of combustion of ethanol. [C = 12, O = 16, H = 1, Specific ...

Assessment: JAMB UTME - Chemistry - 2000 Subject: Chemistry

Question 1 Report

0.46g of ethanol when burned raised the temperature of 50g of water by 14.3K. Calculate the heat of combustion of ethanol.

[C = 12, O = 16, H = 1, Specific heat capacity of water = 4.2 jg-1K-1]

Answer Details
Heat, = -M C Q
= -50 * 4.2 * 14.3
= -300 KJ mol-1

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