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Ideal gas molecules

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Question 3

The particles in the three common states of matter (solid, liquid, and gas) behave differently.

a.

Identify the state of matter corresponding to each of the following descriptions:

  1. The particles are far apart and move rapidly in random directions.
  2. The particles are closely packed together and vibrate about fixed positions.
  3. The particles are close together but can slide past one another.
[3]
b.

Substance X is a gas at room temperature.

At a temperature of −115∘C-115^\circ\text{C}−115∘C, Substance X can exist simultaneously as a solid, a liquid, or a gas. This temperature is called the triple point of Substance X.

Copy and complete the table to find the missing temperatures:

ConditionTemperature in ∘C^\circ\text{C}∘CTemperature in kelvin
Room temperature...293
Triple point of Substance X-115...
[2]
c.

State what happens to the average kinetic energy of the gas molecules as the temperature is lowered from room temperature to the triple point of Substance X.

[1]
d.

State what happens to the volume of an individual molecule of Substance X when the gas changes to a solid at the triple point.

[1]

Ideal gas molecules Questions

  1. IGCSE
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