The three states of matter are solid, liquid and gas - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1
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
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Worked Solution & Example Answer:The three states of matter are solid, liquid and gas - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1
Step 1
What is the name of the change of state when a liquid changes into a solid?
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Answer
The change of state when a liquid turns into a solid is known as C freezing.
Step 2
State the time when the gas first started to form a liquid.
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Answer
The gas first started to form a liquid at 4 minutes.
Step 3
Calculate the number of minutes it took from the gas first starting to form a liquid until the substance was completely liquid.
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Answer
It took 4 minutes for the gas to start forming a liquid and an additional 2 minutes until the substance became completely liquid. Therefore, the total time is 2 minutes.
Step 4
i) give the letter of the substance that is a solid at 20°C
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Answer
The substance that is solid at 20°C is substance W.
Step 5
ii) give the letter of a substance that is a liquid at 50°C.
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Answer
The substance that is a liquid at 50°C is substance Y.
