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15 July, 08:32

Real gases behave most nearly like ideal gases at 1. low temperatures and low pressures. 2. high pressures and low molar masses. 3. high temperatures and high pressures. 4. low temperatures and high pressures. 5. high temperatures and low pressures.

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  1. 15 July, 09:45
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    high temperatures and low pressures

    Explanation:

    At high temperature and low pressure, individual gas molecules are relatively free from intermolecular interaction and move about freely with maximum kinetic energy. Recall that ideal gases are believed not to possess intermolecular forces of attraction hence the molecules are free and move at very high velocity and and maximum kinetic energy. Real gases at low temperature and high pressure associate considerably via van der Waals forces.
  2. 15 July, 09:45
    0
    5. high temperatures and low pressures.

    Explanation:

    Gases that deviate from ideality are known as Real Gases. Real gas behaves more like an ideal gas at higher temperature and lower pressure.

    That is, as the potential energy, PE due to intermolecular forces becomes less significant compared with the particles' kinetic energy, KE and the size of the molecules becomes less significant compared to the empty space between them.
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