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Unformatted text preview: (a) network structures, as in quartz; (b) sheet structures, as in mica; (c) linear structures, such as asbestos. Problem 4: (a) While silica can be made into a glass by cooling it quickly from the liquid state, most common silica glasses include ionic species such as Na + or oxides that crystallize in very different crystal structures, such as PbO 2 , to promote glass formation. Why? (b) Silica glass can be easily formed into elegant stemware or blown into complex ornamental shapes, while crystalline quartz is much more difficult to fabricate in useful shapes. Why? (Note that "crystal" glassware isn't.) Engineering 45: Spring, 2011 Problem Set No.5 page 2 Problem 5: Given the second law of thermodynamics, show: (a) the condition of thermal equilibrium: the temperature of a system is constant at equilibrium; (b) the condition of chemical equilibrium: the chemical potential of any chemical component is constant at equilibrium....
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This note was uploaded on 04/05/2011 for the course ENGIN 45 taught by Professor Devine during the Spring '07 term at Berkeley.
- Spring '07