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21 June, 13:48

If 25.5 l of oxygen are cooled from 150 C to 50 C at constant pressure, what is the new volume

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  1. 21 June, 17:17
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    To solve this we assume that the gas is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

    T1 / V1 = T2 / V2

    V2 = T2 x V1 / T1

    V2 = 323.15 x 25.5 / 423.15

    V2 = 19.47 L
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