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Chapter 12: Problem 59
The greater the molar heat of vaporization of a liquid, the greater its vapor pressure. True or false?
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What is the coordination number of each sphere in (a) a simple cubic lattice, (b) a body-centered cubic lattice, and (c) a face- centered cubic lattice? Assume the spheres to be of equal size.
These compounds are liquid at \(-10^{\circ} \mathrm{C}\); their boiling points are given: butane, \(-0.5^{\circ} \mathrm{C}\); ethanol, \(78.3^{\circ} \mathrm{C}\); toluene, \(110.6^{\circ} \mathrm{C}\). At \(-10^{\circ} \mathrm{C}\), which of these liquids would you expect to have the highest vapor pressure? Which the lowest?
If you lived in Alaska, state which of these natural gases you would keep in an outdoor storage tank in winter and explain why: methane \(\left(\mathrm{CH}_{4}\right),\) propane \(\left(\mathrm{C}_{3} \mathrm{H}_{8}\right),\) or butane \(\left(\mathrm{C}_{4} \mathrm{H}_{10}\right)\)
A solid is hard, brittle, and electrically nonconducting. Its melt (the liquid form of the substance) and an aqueous solution containing the substance do conduct electricity. Classify the solid.
Explain in terms of intermolecular forces why (a) \(\mathrm{NH}_{3}\) has a higher boiling point than \(\mathrm{CH}_{4}\) and \((\mathrm{b}) \mathrm{KCl}\) has a higher melting point than \(\mathrm{I}_{2}\).
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