A sealed glass flask contains nitrogen gas at a temperature of 80∘C80^\circ\text{C}80∘C. No gas can escape or enter the flask.
Describe the arrangement, separation, and motion of the nitrogen molecules inside the flask.
The flask is placed in an ice bath, causing the temperature of the nitrogen gas to decrease to 0∘C0^\circ\text{C}0∘C.
Describe the changes in the motion and energy of the nitrogen molecules as the temperature decreases.
151 exam-style questions on CIE IGCSE Physics 2.1.2a Particle structure and motion in solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.