Question 1a.What is the strongest intermolecular force between hexanemolecules?b. What is the strongest intermolecular force between heptanemolecules?c. What is the strongest intermolecular force between hexane andheptane molecules?d. Based on the previous questions, do you predict that the heatof solution forthe mixing of hexane and heptane is negative, nearly zero orpositive? Explain.e. Does your prediction of the heat of solution for hexane andheptane agree with yourexperimental results?(result: -0.5 degree C) Explain.

0FC3Z6 The Asker · Chemistry

1a.What is the strongest intermolecular force between hexane molecules?

b. What is the strongest intermolecular force between heptane molecules?

c. What is the strongest intermolecular force between hexane and heptane molecules?

d. Based on the previous questions, do you predict that the heat of solution for

the mixing of hexane and heptane is negative, nearly zero or positive? Explain.

e. Does your prediction of the heat of solution for hexane and heptane agree with your

experimental results?(result: -0.5 degree C) Explain.

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Solution:1 a.\mathrm{H}_{3} \mathrm{ClCH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}hexaneThe intermolecular force that dominant among nonpotar molecules like hexane is Induced-dipde induceddipole forces. It is also called London forces.1b.\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}heptaneThe strongest intermolecular force between heptane molecules is Induced-dipole induced-dipole force. It increases ar molar mass increases.1c. The strongest intermolewlar force between hexane and heptane molecules is London forces. With the increase in molar mass of the moleculy the induced dipole also incresjes becmuse the eectrons in larger species are less tightly held allowing the electrons to be more casily prarised.1d. When two norpotar organic liquids live hexane (C6HI4) and heptine ( \left(7 \mathrm{CH}_{16}\right) are mixed then the heat of soution will be nearly zero, i.e. \Delta H=0. As the forces are very weak enthalpy changc will be very small. ...