Physics

posted by Buma

An ideal gas is sealed within a container at a temperature of 17°C and a pressure of 101 kPa. The container is heated until the temperature of the gas reaches100°C. A valve in the container is then opened to allow gas to escape until the pressure falls back to 101 kPa at 100°C. 
a) Calculate the pressure in the gas just before the valve is opened. 
b) Calculate the fraction of the initial mass of gas that was lost as a result of opening the valve

  1. bobpursley

    a. P2=T2P1/T1 temps in Kelvins.
    b. n1=P1V1/RT1
    n2=P2V2/RT2

    n2/n2=T1/T2 in kelvins
    that is the fraction that remains, so fraction lost is 1- that.

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