States of Matter (Edexcel GCSE Chemistry: Combined Science)

The three states of matter are solid, liquid and gas.

What is the name of the change of state when a liquid changes into a solid?

A gas was left to cool to form a liquid.

Figure 1 shows how the temperature of the substance changed with time. 

Figure 1

From A to B the substance is a gas.
From C to D the substance is a liquid.

(1)

............................ minutes 

Figure 2 shows the melting points and boiling points of four substances, W, X, Y and Z. 

Figure 2

Using the information in Figure 2

The diagrams below show particles in five different structures.
The different circles show different particles. 

Draw one straight line from each substance to its structure. 

A solid substance is heated at a constant rate and its temperature is taken every minute

Figure 1 shows the results.

 Figure 1

Use the correct words from the box to complete the sentence:

The ……….. lines on the graph show interconversions between the three states of ………….

Describe the movement of the particles when the substance is at point A.

Name the state the substance is in at point B.

Name the interconversion of state happening at line C.

Changes can be physical or chemical.

Draw one straight line from each change to show if it is a physical change or a chemical change.

What changes during a physical change?

A student puts some solid wax into a test tube and heats it with a Bunsen burner.

[1]

[2]

A teacher reacts sodium with chlorine to make the compound sodium chloride.

Are the properties of sodium chloride the same or different to sodium and chlorine?

Give a reason for your answer.

Figure 1 shows the interconversions of state.

Figure 1

Name the interconversion shown by X.

Complete the sentence:

Freezing point is the same as ……………… point.

Gallium is a metal that melts at 30°C.

Describe what happens to the:

[1]

[1]

A balloon is filled with helium gas.

What is true about the gas particles inside the balloon?