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 = 4.2J/g)

• A.+33000KJ/ mol
• B.+300KJ /mol
• C.-300KJ/mol'
• D.-300KJ/mol