Question

a.) Two groups of students prepared the compound acetamide.Group A isolated is a solid with a melting point of 80.5 degrees C.Group B obtained a compound with a melting point of 74-77 degreesC. When the students consulted the chemistry manual, acetamide wasfound to have a melting point of 82 degrees C. Which group prepareda more pure compound and why?

b.) The melting point of a solid may be defined as thetemperature when both solid and liquid phases coexist. How may youdefine the boiling point of a substance?

c.) The boiling point of liquid is determined by heating itslowly and recording the temperature when the liquid vaporizes.Suppose a student doing the experiment heats the liquid up veryrapidly. Is he likely to get the correct boiling point?

d.) The boiling point of a liquid on the pressure of its vaporover the liquid. Therefore the boiling point of water at the top ofthe Himalayan Mountain is lass than 100 degrees C. What is themelting point of ice on top of the Himalayan mountain?