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What is the critical point of a gas?

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Question: What is the critical point of a gas?

Options:

  1. The temperature at which a gas can no longer be liquefied
  2. The pressure at which a gas behaves ideally
  3. The temperature at which gas molecules stop moving
  4. The point at which gas volume is zero

Correct Answer: The temperature at which a gas can no longer be liquefied

Solution: 

The critical point of a gas is the temperature and pressure at which it can no longer be liquefied, regardless of the pressure applied.

What is the critical point of a gas?

Practice Questions

Q1
What is the critical point of a gas?
  1. The temperature at which a gas can no longer be liquefied
  2. The pressure at which a gas behaves ideally
  3. The temperature at which gas molecules stop moving
  4. The point at which gas volume is zero

Questions & Step-by-Step Solutions

What is the critical point of a gas?
  • Step 1: Understand that gases can change into liquids when cooled or compressed.
  • Step 2: Learn that there is a specific temperature and pressure where a gas cannot become a liquid, no matter how much pressure is applied.
  • Step 3: This specific temperature and pressure is called the 'critical point' of the gas.
  • Step 4: At the critical point, the gas and liquid phases become indistinguishable.
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