Suppose that a sample of gas occupies 187 mL
of volume at 298 K and a pressure of 277 torr.
What would be the volume (expressed of
this sample) if the pressure were changed to
571 torr at 298 K?
Answer in units of mL.


  1. Answer:

    V2 = 90.7 mL


    pressure and volume are inversely proportional, if the pressure is increased, the volume will decrease. In an isothermal process:

    p1V1 = p2V2

    V2 = p1V1/p2 = (277 torr×187 mL)/571 torr

    V2 = 90.7 mL

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