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18 October, 02:35

if I have 22.1 grams of CO2 gas at - 188 degrees Celsius and 165 ml what is the pressure of the gas in kPa

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  1. 18 October, 06:30
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    P = 2.145kPa

    Explanation:

    Mass = 22.1g

    Molar mass of CO2 = 44g/mol

    Vol = 165mL = 0.165L

    T = - 188°C = (-188 + 273.15) K = 85.15K

    R = 8.314J/mol. K

    From ideal gas equation,

    PV = nRT

    P = pressure of the ideal gas

    V = volume the gas occupies

    n = number of moles if the gas

    R = ideal gas constant

    T = temperature of the gas

    n = number of moles

    n = mass / molar mass

    n = 22.1 / 44 = 0.50moles

    PV = nRT

    P = nRT / V

    P = (0.5 * 8.314 * 85.15) / 0.165

    P = 2145.26Pa = 2.145kPa

    Pressure of the gas is 2.145kPa
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