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States of matter

States of matter

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Question 2

A chemical storage facility in a desert region reaches an internal daytime temperature of 40 ∘C40\text{ }^\circ\text{C}40 ∘C. The melting and boiling points of three organic compounds stored inside are given below:

  • Benzene: melting point 5.5 ∘C5.5\text{ }^\circ\text{C}5.5 ∘C, boiling point 80.1 ∘C80.1\text{ }^\circ\text{C}80.1 ∘C
  • Naphthalene: melting point 80.2 ∘C80.2\text{ }^\circ\text{C}80.2 ∘C, boiling point 218.0 ∘C218.0\text{ }^\circ\text{C}218.0 ∘C
  • Pentane: melting point −129.8 ∘C-129.8\text{ }^\circ\text{C}−129.8 ∘C, boiling point 36.1 ∘C36.1\text{ }^\circ\text{C}36.1 ∘C

Identify the physical state (solid, liquid, or gas) of each compound at this storage temperature of 40 ∘C40\text{ }^\circ\text{C}40 ∘C.

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Markscheme

States of matter Questions

  1. IGCSE
  2. /Chemistry
  3. /States of matter

12 exam-style questions on Edexcel IGCSE Chemistry States of matter. Each one has a worked solution and a mark scheme showing where the marks go.

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