Fig. 1 shows particle models for the same substance in three different states. Each box contains the same number of particles. A museum display uses these m...
Question 1 Report
Fig. 1 shows particle models for the same substance in three different states. Each box contains the same number of particles. A museum display uses these models to help visitors compare solid, liquid and gas. The particles are not drawn to scale. The substance can change state when its temperature changes, but it remains the same substance.
(a) State which box represents the gas. [1]
(b) Give one feature of the arrangement of particles in the solid. [2]
(c) Explain why the gas can be compressed much more than the liquid. [2]
Answer Details
(a) Box C represents the gas because its particles are spread far apart throughout the container. [1]
(b) In the solid, particles are closely packed and arranged regularly in fixed positions. [2]
(c) Gas particles have large gaps between them, so they can be pushed much closer together. Liquid particles already have little empty space between them, so liquids are much less compressible. [2]
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