A can, containing only air, has its lid lightly screwed on and is left in strong sunlight. State what happens to the pressure of the air in the can when it gets hot.

The can containing only air which has its lid lightly screwed on and is left in strong sunlight. The mobility of the air particles increases as sunlight strikes the can and then the air inside it. The intermolecular forces in gases are very weak or non-existent. As a result, they lack a defined shape or volume. The collision inside the can grows as it gets hotter. As a result, the force within the container increases, and the pressure rises as well.

A can, containing only air, has its lid lightly screwed on and is left in strong sunlight. In terms of molecules, explain your answer.

The can containing only air which has its lid lightly screwed on and is left in strong sunlight. The mobility of the air particles increases as sunlight strikes the can and then the air inside it. The intermolecular forces in gases are very weak or non-existent. As a result, they lack a defined shape or volume. The collision inside the can grows as it gets hotter. As a result, the force within the container increases, and the pressure rises as well. When compared to liquids and solids, the gaseous state has very tiny attractive forces between the gas particles, which are separated by relatively longer distances. It's vital to remember that compounds in the gaseous form have no defined volume or structure. They have a tendency to take up the whole volume of the container in which they are placed. When it is heated, the molecules will attain more energy and the collisions increase. Furthermore, gases are highly compressible and are known to impose a finite amount of pressure on the container's walls.

E M B I B E

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 9 - The Kinetic Model of Matter>End-of-chapter questions>Q 15

EASY

Upper Secondary: IGCSE

IMPORTANT

Earn 100

Solids, liquids and gases have different properties. The list below gives some of them.

Copy that table and use descriptions from the list to complete it. Any description may be used more than once if appropriate. Two spaces have been filled in to help you.

Shape Molecules

a Solid

b Liquid Move around, close together

c Gas Completely fills the container

Important Questions on The Kinetic Model of Matter

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 9 - The Kinetic Model of Matter>End-of-chapter questions>Q 16

The diagram represents the path taken in air by a smoke particle, as seen in a Brownian motion experiment. The smoke particles can be seen through a microscope, but the air molecules cannot.

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State what causes the smoke particles to move like this.

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 9 - The Kinetic Model of Matter>End-of-chapter questions>Q 16

The diagram represents the path taken in air by a smoke particle, as seen in a Brownian motion experiment. The smoke particles can be seen through a microscope, but the air molecules cannot.

Question Image