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Using the ideal gas law to calcuate the volume of CO2 watch

    • Thread Starter

    So here's my reaction:
    2NaHCO3 --> Na2CO3 + H2O + CO2

    I need to use the ideal gas law to calculate the volume of CO2 which would be created according to the ideal gas law.

    Here's what I know:
    0.3 grams of 2NaHCO3 is used.
    The temperature was 292 K.
    2NaHCO3 has a molar mass of 168.
    CO2 has a molar mass of 44.
    It was normal atmospheric pressure.

    I understand how to use the ideal gas law, but the units keep putting me off. Anyone willing to help?

    NOTE: This is not a task created by our teacher. It is simply for my own understanding, as I am not taking chemistry in what would the Danish equivalent of A-levels.

    You're going to calculate the amount (in mol) of CO2.
    You'll use whatever value for 'normal atmospheric pressure' that you normally use (101000 Pa?)
    Rearrange PV = nRT and plug all your numbers in.
    The answer will come out in m3 (rather than the usual dm3 or cm3), so the answer will appear to be VERY small. If you wanted to convert into cm3, just multiply your answer by 1000000.

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