Which gas behaves most like an ideal gas under standard conditions? (2019)

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Question: Which gas behaves most like an ideal gas under standard conditions? (2019)

Options:

Correct Answer: Helium

Exam Year: 2019

Solution:

Helium behaves most like an ideal gas under standard conditions due to its low intermolecular forces and small size.

Which gas behaves most like an ideal gas under standard conditions? (2019)

Which gas behaves most like an ideal gas under standard conditions? (2019)

Step 1: Understand what an ideal gas is. An ideal gas is a theoretical gas that perfectly follows the gas laws without any deviations.
Step 2: Know the conditions referred to as 'standard conditions.' This usually means a temperature of 0 degrees Celsius and a pressure of 1 atmosphere.
Step 3: Recognize that real gases can deviate from ideal behavior due to intermolecular forces and the size of the gas particles.
Step 4: Identify gases that are known to behave closely to ideal gases. Common examples include helium, neon, and hydrogen.
Step 5: Compare the properties of these gases. Helium is very small and has weak intermolecular forces, which means it behaves more like an ideal gas.
Step 6: Conclude that among the common gases, helium behaves most like an ideal gas under standard conditions.

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