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Chapter 10: Q74E. (page 592)
Substance B is hard, does not conduct electricity, and melts at\({\rm{1200 ^\circ C}}\). Substance B is likely a(n): (a) ionic solid (b) metallic solid (c) molecular solid (d) covalent network solid
The substance B is covalent solid.
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Identify the type of crystalline solid (metallic, network covalent, ionic, or molecular) formed by each of the following substances:
\(\begin{array}{l}{\rm{(a)CaC}}{{\rm{l}}_{\rm{2}}}\\{\rm{(b)SiC}}\\{\rm{(c)}}{{\rm{N}}_{\rm{2}}}\\{\rm{(d)Fe}}\\{\rm{(e)C(graphite)}}\\{\rm{(f)C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{3}}}\\{\rm{(g)HCl}}\\{\rm{(h)N}}{{\rm{H}}_{\rm{4}}}{\rm{N}}{{\rm{O}}_{\rm{3}}}\\{\rm{(i)}}{{\rm{K}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{4}}}\end{array}\)
What is the evidence that all neutral atoms and molecules exert attractive forces on each other?
From the phase diagram for carbon dioxide determine the state of CO2 at:
\(\begin{aligned}{\left( {\rm{a}} \right){\rm{ 20 ^\circ C and 1000 kPa}}}\\{\left( {\rm{b}} \right){\rm{ 10 ^\circ C and 2000 kPa}}}\\{\left( {\rm{c}} \right){\rm{ 10 ^\circ C and 100 kPa}}}\\{\left( {\rm{d}} \right){\rm{ - 40 ^\circ C and 500 kPa}}}\\{\left( {\rm{e}} \right){\rm{ - 80 ^\circ C and 1500 kPa}}}\\{\left( {\rm{f}} \right){\rm{ - 80 ^\circ C and 10 kPa}}}\end{aligned}\)
Pressure cookers allow food to cook faster because the higher pressure inside the pressure cooker increases the boiling temperature of water. A particular pressure cooker has a safety valve that is set to vent steam if the pressure exceeds \({\rm{3}}{\rm{.4 atm}}\). What is the approximate maximum temperature that can be reached inside this pressure cooker? Explain your reasoning.
The boiling point of ethyl ether was measured to be 10 掳C at a base camp on the slopes of Mount Everest. as shown to determine the approximate atmospheric pressure at the camp.
Figure 10.24 The boiling points of liquids are the temperatures at which their equilibrium vapor pressures equal the pressure of the surrounding atmosphere. Normal boiling points are those corresponding to a pressure of 1 atm (101.3
kPa.)
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