Photo AI
The structures of diamond and graphite are shown - Edexcel - GCSE Chemistry - Question 6 - 2015 - Paper 1
Question 6
The structures of diamond and graphite are shown. (a) (i) State the maximum number of covalent bonds formed by a carbon atom in a diamond crystal. (ii) Which of ... show full transcript
Worked Solution & Example Answer:The structures of diamond and graphite are shown - Edexcel - GCSE Chemistry - Question 6 - 2015 - Paper 1
Step 1
Step 2
Which of the following statements about diamond and graphite is true? Put a cross (X) in the box next to your answer.
Answer
The correct answer is D: they both have high melting points. Diamond has a high melting point due to the strong covalent bonds in its structure, while graphite also has a high melting point due to the strength of the bonds between the layers.
Step 3
Explain, in terms of its structure, why graphite is able to be used as a lubricant.
Answer
Graphite consists of layers of carbon atoms arranged in a hexagonal lattice. These layers are held together by weak van der Waals forces, allowing them to slide over each other easily. This property enables graphite to act as a lubricant, reducing friction between surfaces.