Learners investigate factors that influence the boiling points of organic compounds.
The boiling points of some organic compounds obtained are shown in the table below.
3.1 Define the term boiling point. (2)
3.2 The boiling points of compounds A, B and C are compared.
3.2.1 How do the boiling points vary from compound A to compound C?
Choose from INCREASES, DECREASES or REMAINS THE
SAME. (1)
3.2.2 Explain the answer to QUESTION 3.2.1. (3)
3.3 The boiling points of compounds B, C and D are compared.
Is this a fair comparison?
Choose from YES or NO. Give a reason for the answer. (2)
3.4 The boiling points of compounds E and F are compared.
3.4.1 State the independent variable for this comparison. (1)
3.4.2 Write down the name of the strongest Van der Waals force present
in compound F. (1)
3.5 Which compound, D or E, has a higher vapour pressure? Give a reason for
the answer. (2)
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