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In an isothermal process for an ideal gas, which of the following is true?

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Question: In an isothermal process for an ideal gas, which of the following is true?

Options:

  1. The internal energy remains constant.
  2. The temperature increases.
  3. The pressure decreases.
  4. The volume remains constant.

Correct Answer: The internal energy remains constant.

Solution: 

In an isothermal process, the temperature remains constant, which implies that the internal energy of an ideal gas also remains constant.

In an isothermal process for an ideal gas, which of the following is true?

Practice Questions

Q1
In an isothermal process for an ideal gas, which of the following is true?
  1. The internal energy remains constant.
  2. The temperature increases.
  3. The pressure decreases.
  4. The volume remains constant.

Questions & Step-by-Step Solutions

In an isothermal process for an ideal gas, which of the following is true?
Correct Answer: Internal energy remains constant.
  • Step 1: Understand what an isothermal process is. It means the temperature of the system does not change.
  • Step 2: Know that an ideal gas has a specific relationship between temperature, pressure, and volume.
  • Step 3: Remember that the internal energy of an ideal gas depends only on its temperature.
  • Step 4: Since the temperature is constant in an isothermal process, the internal energy of the ideal gas also remains constant.
  • Isothermal Process – An isothermal process is a thermodynamic process in which the temperature of the system remains constant.
  • Ideal Gas Behavior – For an ideal gas, the internal energy is a function of temperature only, meaning it remains constant during an isothermal process.
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