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2.1 Kinetic particle model of matter

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Question 213
a.

Identify the state of matter (solid, liquid, or gas) being described in each of the following cases:

  1. The particles are closely packed in a random, disordered arrangement and are free to move and slide past one another.
  2. The particles are highly ordered in a regular lattice structure, vibrating about fixed positions.
  3. The particles are widely separated, moving rapidly and randomly with negligible attractive forces between them.
[3]
b.

Name the term used to describe the process that is happening in each of the following scenarios:

(i) A liquid changes into a solid at a constant temperature.

(ii) A liquid changes into a gas, with vapor bubbles forming throughout the entire volume of the liquid.

(iii) A solid changes directly into a gas without passing through the liquid state.

[3]
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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