(a) List two differences between solids and liquids.
(b) The graph below is the heating curve for a solid X. Use the graph to answer Questions (i) — (iii) below.
(i) What is the melting point of X? (ii) If the vapour of X is cooled, at what temperature will it start to condense? (iii) (I) As X is heated, state what happens to the: I. frequency of collision of molecules of X; (II) value of the entropy of the system.
Explanation
Solids
Liquids
1. Have definite2. Particles are closely packed
Assume the shape of containerLoosely bound particles
(b)(i) The melting point of x is 60°C (ii) At 210°C (iii)(i) The frequency of collision of molecules of x increases (ii) The value of the entropy of the system also increases.
