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17 July, 19:11

If decomposition of 1 mole of ethylene with a gas density of 0.215g/mL starts at 29 degree celcius and the temperature increases by 950K, what is the final pressure of the confined gas?

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  1. 17 July, 19:24
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    We calculate first the initial pressure of the gas.

    P = nRT/V

    = (0.215 g/mL) (1 mol/16 g) (0.0821 L. atm/mol K) (302K)

    = 0.333 atm

    Using the relationship between the pressure and temperature,

    P1/T1 = P2/T2

    Substituting the known values,

    (0.333 atm) / (29 + 273) = P2 / (950)

    P2 = 1.05 atm
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