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29 August, 09:02

How much energy will be released from burning 230.0 g of liquid methanol (CH4O) in excess oxygen.

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  1. 29 August, 11:11
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    The molar mass of methanol is 12.01 + 4.04 + 16 = 32.05 g/mol

    230.0 g of methanol / 32.05 g/mol = 7.176 mol methanol

    The heat of combustion of methanol (CH3OH or CH4O) is - 715.0 kJ/mol. (Negative sign means the energy is released)

    Multiplying 7.176 mol by - 715.0 kJ/mol gives - 5,131 kJ.
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