Figure 3 shows a metal spoon and two test tubes being heated in a water bath - Edexcel - GCSE Chemistry - Question 2 - 2022 - Paper 1
Question 2
Figure 3 shows a metal spoon and two test tubes being heated in a water bath.
One test tube contains a piece of chocolate, the other some liquid egg white.
After he... show full transcript
Worked Solution & Example Answer:Figure 3 shows a metal spoon and two test tubes being heated in a water bath - Edexcel - GCSE Chemistry - Question 2 - 2022 - Paper 1
Step 1
a) Describe the arrangement of particles in a solid.
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Answer
In a solid, particles are tightly packed in a fixed position, arranged in a regular lattice structure. This close arrangement allows them to vibrate in place but not move freely.
Step 2
b) Describe the movement of particles in a liquid.
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Answer
In a liquid, the particles are not arranged in a fixed structure. They are close together but can move around each other, allowing liquids to flow and take the shape of their container.
Step 3
c) Explain what happens when the chocolate is heated.
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When heated, the chocolate changes from a solid to a liquid state. This process involves the absorption of heat energy, which breaks the bonds between the particles, allowing them to move more freely and causing the chocolate to melt.
Step 4
d) State what happens to the egg white when heated and then cooled.
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Answer
When heated, the egg white changes from a liquid to a solid state. After it cools, the egg white remains solid and does not revert back to a liquid, indicating that this change is irreversible.
