Zaymiey

🧪 Chemistry  ·  States of Matter  ·  NEET & JEE

The average kinetic energy of the molecules of an ideal gas depends only on its:

Answer: absolute temperature.

  • A externally applied pressure
  • B absolute temperature
  • C overall molecular molar mass
  • D total container volume

Correct answer: B. absolute temperature

Explanation: Average kinetic energy = (3/2)kT, a function of absolute temperature alone.

Graph of pressure versus volume for a fixed amount of gas at constant temperature: the curve falls steeply then flattens, a hyperbola showing pressure inversely proportional to volume.

Boyle's law: at constant temperature the pressure of a fixed mass of gas is inversely proportional to its volume (P ∝ 1/V), so the P–V plot is a hyperbola — halving the volume doubles the pressure. Image: Reginaprice2013, CC BY-SA 3.0, via Wikimedia Commons.

Concept context

Discover why gases expand to fill any container while liquids flow and solids hold their shape. Master the gas laws, the ideal gas equation, and the reasons real gases deviate from ideal behavior.

Read the full States of Matter notes →