A liquid, X, was allowed to cool in air. The temperature was measured every five secds. The graph below represents the cooling curve of X. (a) What is the melting point of X?
(b) What is the room temperature? Explain your answer.
(c) X has a boiling point of 128°C. Explain, in terms of the kinetic particle theory, what happens to the particles of X as it is heated from 100°C to 150°C.
(d) In which parts of the graph is energy being given out to the surroundings?​