GCSE Edexcel Chemistry States of Matter: 1. The three states of matter ar

Question

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

(a) What is the name of the change of state when a liquid changes into a solid?
A condensation
B evaporation
C freezing
D melting

(b) A gas was left to cool to form a liquid.
Figure 1 shows how the temperature of the substance changed with time.

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

(i) State the time when the gas first started to form a liquid.
(ii) Calculate the number of minutes it took from the gas first starting to form a liquid until the substance was completely liquid.

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

Using the information in Figure 2:
(i) give the letter of the substance that is a solid at 20°C.
(ii) give the letter of a substance that is a liquid at 50°C.

1. The three states of matter are solid, liquid and gas - Edexcel - GCSE Chemistry - Question 1 - 2019 - Paper 1

Worked Solution & Example Answer:1. The three states of matter are solid, liquid and gas - Edexcel - GCSE Chemistry - Question 1 - 2019 - Paper 1

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

State the time when the gas first started to form a liquid.

Calculate the number of minutes it took from the gas first starting to form a liquid until the substance was completely liquid.

Give the letter of the substance that is a solid at 20°C.

Give the letter of a substance that is a liquid at 50°C.

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