Chapter 12

One of these two substances is a liquid at room temperature and the other one is a gas. Which one is the liquid and why? \(\mathrm{CH}_{3} \mathrm{OH} \quad \mathrm{CH}_{3} \mathrm{SH}\)

One of these two substances is a liquid at room temperature and the other one is a gas. Which one is the liquid and why? $$ \mathrm{CH}_{3} \mathrm{OCH}_{3} \quad \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH} $$

Are \(\mathrm{CH}_{3} \mathrm{OH}\) and \(\mathrm{H}_{2} \mathrm{O}\) miscible?

Determine whether a homogeneous solution forms when each pair of substances is mixed. (a) \(\mathrm{CCl}_{4}\) and \(\mathrm{H}_{2} \mathrm{O}\) (b) \(\mathrm{Br}_{2}\) and \(\mathrm{CCl}_{4}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}\) and \(\mathrm{H}_{2} \mathrm{O}\)

Identify each solid as molecular, ionic, or atomic. (a) \(\mathrm{CaCl}_{2}(s)\) (b) \(\mathrm{CO}_{2}(s)\) (c) \(\mathrm{Ni}(\mathrm{s})\) (d) \(\mathrm{I}_{2}(s)\)

Identify each solid as molecular, ionic, or atomic. (a) \(\mathrm{H}_{2} \mathrm{~S}(s)\) (b) \(\mathrm{KCl}(s)\) (c) \(\mathrm{N}_{2}(s)\) (d) \(\mathrm{NI}_{3}(s)\)

Identify each solid as molecular, ionic, or atomic. (a) \(\mathrm{SF}_{6}(s)\) (b) \(C(s)\) (c) \(\mathrm{MgCl}_{2}(s)\) (d) \(\mathrm{Ti}(\mathrm{s})\)

For each pair of solids, determine which solid has the higher melting point and explain why. (a) \(\mathrm{Ti}(\mathrm{s})\) and \(\mathrm{Ne}(\mathrm{s})\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (s) and \(\mathrm{H}_{2} \mathrm{~S}(s)\) (c) \(\mathrm{Kr}(s)\) and \(\mathrm{Xe}(s)\) (d) \(\mathrm{NaCl}(s)\) and \(\mathrm{CH}_{4}(s)\)

For each pair of solids, determine which solid has the higher melting point and explain why. (a) \(\mathrm{Fe}(s)\) and \(\mathrm{CCl}_{4}(s)\) (b) \(\mathrm{KCl}(\mathrm{s})\) or \(\mathrm{HCl}(\mathrm{s})\) (c) \(\mathrm{TiO}_{2}(\mathrm{~s})\) or \(\mathrm{HOOH}(\mathrm{s})\)

List these substances in order of increasing boiling point: $$ \mathrm{H}_{2} \mathrm{O}, \mathrm{Ne}, \mathrm{NH}_{3}, \mathrm{NaF}, \mathrm{SO}_{2} $$