Title: melting and boiling point Objective:? Introduction:? Conclusion:? Experim

Question

Title: melting and boiling point Objective:? Introduction:? Conclusion:? Experiment Two Melting and Boiling Points Data Sheet Name Laboratory Section Melting Point of p-dichlorobenzene 26 1 2. Melting Point of aceramide 55.2 1. Melting Point of p-dichlorobenzene 2. Melting Point of acetamide552C 3. Melting Point of solid mixture 53- 4. Boiling Point of acetone 55 5. Boiling Point of ethyl alcohol 76' 6. Boiling Point of acetone/ethy) alcohol mixture 27 by alcohol 7 6. Boiling Point of acetone/ethyl alcohol mixture

Explanation / Answer

Objective : To determine the melting point and the boiling point of various substances.

Introduction: Six different substances are given. Melting point of p-dichlorobenzzene, acetamide and solid mixture is to be determined. Also the boiling point of acetone, ethyl alcohol and acetone/ethyl alcohol mixture is to be determined.

A melting point is the temperature at which a solid substance changes its state to the liquid state.

A boiling point is the temperature at which a liquid substance boils and changes its state to the gaseous state.

Conclusion The melting points of p-dichlorobenzene, acetamide and solid mixture are 75.9, 55.2, 53.8 oC respectively and the boiling points of acetone, ethyl alcohol and acetone/ ethyl alcohol mixture are 72.7 oC respectively. The boiling points of ethyl alcohol and the mixture ethyl alcohol/acetone are higher than the boiling point of acetone due to formation of hydrogen bonds. Melting points / boiling points of a substance are higher when it has high molar mass or high intermolecular forces of attraction.

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