hw9 - November 2 (to be tested November 9) 1. (a) In the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
3.091 Fall Term 2004 Homework #9 November 2 (to be tested November 9) 1. (a) In the context of amorphous inorganic compounds, name two network formers, two network modifiers, and one intermediate. (b) Sketch the variation of molar volume with temperature for pure silica. Show glass formation at two different cooling rates. As well, show crystallization. On each cooling curve, label the melting point or the glass transition temperature. (c) What are two key factors that determine whether a material will solidify as a glass or a crystal? 2. Account for the fact that Al does not form a stable glass while elemental Se does. 3. Explain why at room temperature glasses are brittle while metals are ductile. 4. Describe two analytical techniques that allow you to distinguish an amorphous solid from a crystalline solid. 5. The addition of CaO to SiO 2 lowers the glass transition temperature. Explain with reference to electronic structure and bonding. 6.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/02/2009 for the course CHEMISTRY 3.091 taught by Professor Donsadoway during the Fall '04 term at MIT.

Page1 / 2

hw9 - November 2 (to be tested November 9) 1. (a) In the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online