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Chapter 10: Q71E. (page 592)
Classify each substance in the table as either a metallic, ionic, molecular, or covalent network solid
X is ionic, Y is metallic and Z is covalent network solids.
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In terms of their bulk properties, how do liquids and solids differ? How are they similar?
Describe the crystal structure of Pt, which crystallizes with four equivalent metal atoms in a cubic unit cell
From the phase diagram for carbon dioxide determine the state of CO2 at:
\(\begin{aligned}{\left( {\rm{a}} \right){\rm{ 20 ^\circ C and 1000 kPa}}}\\{\left( {\rm{b}} \right){\rm{ 10 ^\circ C and 2000 kPa}}}\\{\left( {\rm{c}} \right){\rm{ 10 ^\circ C and 100 kPa}}}\\{\left( {\rm{d}} \right){\rm{ - 40 ^\circ C and 500 kPa}}}\\{\left( {\rm{e}} \right){\rm{ - 80 ^\circ C and 1500 kPa}}}\\{\left( {\rm{f}} \right){\rm{ - 80 ^\circ C and 10 kPa}}}\end{aligned}\)
Explain why ice, which is a crystalline solid, has a melting temperature of 0 °C, whereas butter, which is an amorphous solid, softens over a range of temperatures.
The hydrogen fluoride molecule, HF, is more polar than a water molecule, \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) (for example, HF has a greater dipole moment). Yet the molar enthalpy of vaporization for liquid hydrogen fluoride is lesser than that of water. Explain.
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