A pure substance P consists of small molecules and has a boiling point of −25 ∘C-25\,^\circ\text{C}−25∘C. Room temperature is 20 ∘C20\,^\circ\text{C}20∘C.
Explain why P is a gas at room temperature and what happens to its molecules and bonds when it boils.
84 exam-style questions on AQA GCSE Chemistry 2.2 How bonding and structure are related to the properties of substances, covering 2.2.1a The three states of matter, 2.2.1b Limitations of the simple particle model, 2.2.2 State symbols in chemical equations, 2.2.3 Properties of ionic compounds, 2.2.4 Properties of small molecules, 2.2.5 Polymers, 2.2.6 Giant covalent structures, 2.2.7 Properties of metals and alloys, and 2.2.8 Metals as conductors. Each one has a worked solution and a mark scheme showing where the marks go.