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The conditions necessary for a gas to liquefy are
  • a)
    Compression
  • b)
    Decrease in the temperature
  • c)
    Increase in temperature
  • d)
    Both decreasing temperature and compression
Correct answer is option 'D'. Can you explain this answer?
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The conditions necessary for a gas to liquefy area)Compressionb)Decrea...
Gases become more difficult to liquefy as the temperature increases because the kinetic energies of the particles that make up the gas also increase. The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.
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The conditions necessary for a gas to liquefy area)Compressionb)Decrea...
Conditions necessary for a gas to liquefy:

Compression and Decrease in Temperature

When a gas is compressed, it reduces the volume occupied by the gas. This results in a decrease in the distance between the gas particles, leading to an increase in the intermolecular forces of attraction. As a result, the gas particles come closer and start to move slowly, which can lead to the formation of a liquid.

Similarly, when the temperature of a gas is decreased, the kinetic energy of the gas molecules decreases, which reduces their movement. Because of the reduction in movement, the intermolecular forces of attraction between the gas particles increase, which can lead to the formation of a liquid.

Both Decreasing Temperature and Compression

When both temperature and pressure are decreased simultaneously, the gas particles move less due to the decrease in temperature and also come closer due to the increase in pressure. This results in a substantial increase in the intermolecular forces of attraction, which can lead to the formation of a liquid.

Therefore, to liquefy a gas, both the temperature and pressure of the gas need to be reduced simultaneously. This process is known as liquefaction.
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The conditions necessary for a gas to liquefy area)Compressionb)Decrease in the temperaturec)Increase in temperatured)Both decreasing temperature and compressionCorrect answer is option 'D'. Can you explain this answer?
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