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

JAMB 2000

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]

A. +3000 KJ mol^-1
B. +300 KJ mol^-1
C. -300 KJ mol^-1
D. -3000 KJ mol^-1

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Correct Answer: Option C

Explanation

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

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

Correct Answer: Option C

Explanation

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