A sample of liquid air is slowly warmed from −200 ∘C-200\,^\circ\mathrm{C}−200∘C.
| Substance | Melting point / ∘C^\circ\mathrm{C}∘C | Boiling point / ∘C^\circ\mathrm{C}∘C |
|---|---|---|
| nitrogen | -210 | -196 |
| argon | -189 | -186 |
| oxygen | -218 | -183 |
What is the state of each substance at −185 ∘C-185\,^\circ\mathrm{C}−185∘C?
nitrogen liquid, argon liquid, oxygen gas
nitrogen gas, argon liquid, oxygen liquid
nitrogen liquid, argon gas, oxygen gas
nitrogen gas, argon gas, oxygen liquid
84 exam-style questions on Edexcel GCSE Chemistry 3.1 States of matter, covering 3.1.1 The three states of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.