Separate samples of substances J and K are placed in rigid containers at $∘C20\,^\circ\mathrm{C}$ . The observations are shown in the table.

Substance	Observation in a 120 cm³ container	Observation in a 300 cm³ container
J	Keeps its own shape and occupies 15.0 cm³	Keeps the same shape and occupies 15.0 cm³
K	Spreads throughout the container and occupies 120 cm³	Spreads throughout the container and occupies 300 cm³

Explain which substance is a solid and which is a gas. Use the movement of their particles and the observations in your answer.

Two identical sealed syringes are prepared at $∘C20\,^\circ\mathrm{C}$ . One is completely filled with a sample of J and the other is completely filled with K, with no air in either syringe. The same force is applied to each plunger. Predict which substance shows the greater decrease in volume. Explain your answer.

Separate samples of substances J and K are placed in rigid containers at $∘C20\,^\circ\mathrm{C}$ . The observations are shown in the table.

Substance	Observation in a 120 cm³ container	Observation in a 300 cm³ container
J	Keeps its own shape and occupies 15.0 cm³	Keeps the same shape and occupies 15.0 cm³
K	Spreads throughout the container and occupies 120 cm³	Spreads throughout the container and occupies 300 cm³

Explain which substance is a solid and which is a gas. Use the movement of their particles and the observations in your answer.

1.1 The particle model

Question 9

Markscheme

1.1 The particle model

Question 9

Markscheme

1.1 The particle model

Question 9

1.1 The particle model Questions

1.1 The particle model

Question 9

1.1 The particle model Questions