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3 May, 12:25

What mass of carbon monooxide must be burned to produce 175 kJ of heat under standard state condaitions?

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Answers (1)
  1. 3 May, 13:42
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    17.3124 grams

    Explanation:

    Given;

    Amount of heat to be produced = 175 kJ

    Molar mass of the carbon monoxide = 12 + 16 = 28 grams

    Now,

    The standard molar enthalpy of carbon monoxide = 283 kJ/mol

    Thus,

    To produce 175 kJ heat, number of moles of CO required will be

    = Amount heat to be produced / standard molar enthalpy of CO

    or

    = 175 / 283

    = 0.6183

    Also,

    number of moles = Mass / Molar mass

    therefore,

    0.6183 = Mass / 28

    or

    Mass of the CO required = 0.6183 * 28 = 17.3124 grams
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