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2.1 Kinetic particle model of matter

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Question 105

A student investigates the decrease in temperature of a solid metal block after it is removed from a heater.

Which row correctly describes the change in internal energy and the explanation for this change?

A

Change in internal energy: decrease | Explanation: The random kinetic energy of the atoms decreases.

B

Change in internal energy: decrease | Explanation: The metal block changes state and melts.

C

Change in internal energy: increase | Explanation: The potential energy of the atoms increases.

D

Change in internal energy: increase | Explanation: The average speed of the atoms increases.

Markscheme

2.1 Kinetic particle model of matter Questions

  1. IGCSE
  2. /Physics
  3. /2.1 Kinetic particle model of matter

321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.

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