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2.2 Thermal properties and temperature

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Question 65

A test tube containing liquid naphthalene is cooling and solidifying (freezing) at its melting point of 80∘C80^\circ\text{C}80∘C. Nearby, a beaker of pure water is boiling vigorously on a hot plate. Both are in a laboratory at 20∘C20^\circ\text{C}20∘C.

What is happening to the temperature of the solidifying naphthalene and what is happening to the temperature of the boiling water?

A

Temperature of naphthalene: constant; temperature of water: constant

B

Temperature of naphthalene: constant; temperature of water: increasing

C

Temperature of naphthalene: decreasing; temperature of water: constant

D

Temperature of naphthalene: decreasing; temperature of water: increasing

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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