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Homework Help: Gas Law Problems

  1. Mar 9, 2004 #1
    Gas Law Problems
    A gas-filled balloon occupies a 4-L volume at a pressure of 300kPa. What volume will the balloon occupy if it rises to a height of where the pressure is 200kPa?

    Calculate the hieght to which a pressure of one atmosphere can life a column of water. Mercury is 13.6 times as dense as water.

    a 60-m^3 volume of gasy is at a temperature of 27 degrees Celsius. Under constant pressure the gas is cooles to -73 degrees Celsius. Calculate the new volume of gas.

    While held at a constant pressure, 12 L of gas are heated at 127.5 degrees celsius. If the new volume is 18L, what was the original temperature of the gas in degrees celsius?

    A gas is kept in a closed container at 620kPa. The gas is heated from 100 degrees celsius to 300 degrees celsius. Calculate the new pressure of the gas.

    a 6.0-L volume of gas has a pressure of 140 kPa and a temperature of -14 degrees celsius. What will be the pressure of this gas if the volume is reduced to 1.5 L and the temperature raised to 504 degrees celsius?

    The density of air is 1.3g/L at standard conditions of 101 kPa and 0 degrees celsius. Determine the mass of 3.0 L of ait at a pressure of 138.2 kPa and a temperature of 273 degrees celsius.

    One atmosphere of air pressure supports a column of water approximately 10.3 m high. A 2.0 cm^3 bubble of air is released by a diver working 62.4 m below the surface of a deep lake. If its temperature remains constant, what is the volume of the bubble as it reaches the surface? Hint: the pressure on the surface of the lake is on atm.
     
  2. jcsd
  3. Mar 9, 2004 #2
    I think these can all be solved using the ideal gas law, pv=nrt

    Since you didn't ask specificly for direction and have shown no work, this is about the most help you can expect to get here.


    Hint:

    and the answer is in another problem:
     
  4. Mar 9, 2004 #3
    I just got done with this lesson in chemistry. Most of those can be solved using the Boyle's Law and Combined Gas Law.

    boyle's law - P1/P2 = V2/V1

    Combined gas law - P1V1/T1 = P2V2/T2


    P-Pressure
    V-Volume
    T-Temperature

    *You might have to get P1 by using PG=Patm-Hg or PG=Patm-Hg-H2O

    *Remember to change Celsius to Kelvins (C + 273)

    There's some problems on there I don't know how to do.

    I dont know why this is on a general physics forum. I've haven't had
    physics yet. Am I going to see Gas Law again?
     
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