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Ideal gas molecules

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Question 21

This question is about the thermal properties and pressure of gases.

a.

A sample of gas is heated inside a rigid, sealed research canister with a constant volume.

Which statement correctly describes the behaviour of the gas molecules?

  • A They collide with the walls of the canister less frequently.
  • B Their average spacing increases significantly.
  • C They collide with the walls of the canister with greater average force.
  • D The individual molecules expand in volume.
[1]
b.

Describe what happens to the average kinetic energy of the gas molecules as the temperature of the gas is reduced from 400 K400\text{ K}400 K down to 150 K150\text{ K}150 K.

[2]
c.

Convert a temperature of −23 ∘C-23\ ^\circ\text{C}−23 ∘C into kelvin (K).

[1]
d.

The gas inside the canister has a pressure of 120 kPa120\text{ kPa}120 kPa at a temperature of −23 ∘C-23\ ^\circ\text{C}−23 ∘C. Calculate the new pressure of the gas when its temperature rises to 127 ∘C127\ ^\circ\text{C}127 ∘C.

[3]

Ideal gas molecules Questions

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