Question
The diagram below shows the heating curve of a pure substance. Study it and answer the questions that follow:
(a) What physical changes are taking place at points X and Z? (b)Explain what happens to the melting point of sodium chloride added to this substance
(a) What physical changes are taking place at points X and Z? (b)Explain what happens to the melting point of sodium chloride added to this substance
Answer
a) X - melting point ?
Z - Boiling point ?
b) Its melting point is lowered and becomes less sharp due to the introduction of an impurity ?
Z - Boiling point ?
b) Its melting point is lowered and becomes less sharp due to the introduction of an impurity ?
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