Which haloalkane would you expect to have the highest boiling point?

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Question: Which haloalkane would you expect to have the highest boiling point?

Options:

Correct Answer: Iodoethane

Solution:

Iodoethane has the highest boiling point due to the larger size and greater polarizability of iodine, leading to stronger van der Waals forces.

Which haloalkane would you expect to have the highest boiling point?

Which haloalkane would you expect to have the highest boiling point?

Step 1: Understand what haloalkanes are. Haloalkanes are organic compounds that contain carbon, hydrogen, and halogen atoms (like iodine, bromine, chlorine, or fluorine).
Step 2: Know that boiling point is affected by the strength of the forces between molecules. Stronger forces lead to higher boiling points.
Step 3: Identify the halogens in the haloalkanes. Iodine is larger and heavier than bromine, chlorine, and fluorine.
Step 4: Recognize that larger atoms like iodine can create stronger van der Waals forces because they are more polarizable. This means they can easily form temporary dipoles.
Step 5: Compare the haloalkanes. Iodoethane (which contains iodine) will have stronger van der Waals forces compared to haloalkanes with lighter halogens.
Step 6: Conclude that iodoethane has the highest boiling point among the haloalkanes due to the larger size and greater polarizability of iodine.

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