91Ó°ÊÓ

The nightly winter temperature drop in a seaside town is usually less than that in nearby towns that are farther inland. Explain.

How much heat is required to vaporize \(33.8 \mathrm{~g}\) of water at \(100^{\circ} \mathrm{C} ?\)

How much heat is required to melt \(37.4 \mathrm{~g}\) of ice at \(0{ }^{\circ} \mathrm{C} ?\)

What kinds of intermolecular forces are present in each substance? (a) \(\mathrm{Kr}\) (b) \(\mathrm{N}_{2}\) (c) \(\mathrm{CO}\) (d) \(\mathrm{HF}\)

What kinds of intermolecular forces are present in each substance? (a) \(\mathrm{HCl}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{Br}_{2}\) (d) \(\mathrm{He}\)

What kinds of intermolecular forces are present in each substance? (a) \(\mathrm{NCl}_{3}\) (trigonal pyramidal) (b) \(\mathrm{NH}_{3}\) (trigonal pyramidal) (c) \(\mathrm{SiH}_{4}\) (tetrahedral) (d) \(\mathrm{CCl}_{4}\) (tetrahedral)

What kinds of intermolecular forces are present in a mixture of potassium chloride and water?

What kinds of intermolecular forces are present in a mixture of calcium bromide and water?

Which substance has the highest boiling point? Why? They are all nonpolar. (a) \(\mathrm{CH}_{4}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{3}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2}\)

Which noble gas has the highest boiling point? Why? (a) \(\mathrm{Kr}\) (b) \(X_{e}\) (c) \(\mathrm{Rn}\)