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4 January, 20:31

A mass of gas has a volume of 4m3, a temperature of 290k, and an absolute pressure of 475 kpa. When the gas is I love to expand to 6.5 M3 it's new temperature is 277K what's the absolute pressure of the gas after expansion?

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  1. 4 January, 23:09
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    Given:

    V1 = 4m3

    T1 = 290k

    P1 = 475 kpa = 475000 Pa

    V2 = 6.5m3

    T2 = 277K

    Required:

    P

    Solution:

    n = PV/RT

    n = (475000 Pa) (4m3) / (8.314 Pa-m3/mol-K) (290k)

    n = 788 moles

    P = nRT/V

    P = (788 moles) (8.314 Pa-m3/mol-K) (277K) / (6.5m3)

    P = 279,204 Pa or 279 kPa
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