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Homework Help: Basic Thermodynamics Question

  1. May 4, 2005 #1
    My teacher was telling me how when you pour a hot liquid into a crystal glass that it will shatter. This is due to the transfer of heat, which speeds up the molecules in the cup. But air had something to do with it and I can not remember what. Does anyone have an idea? Thanks.
  2. jcsd
  3. May 4, 2005 #2

    Andrew Mason

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    I suppose that if there is air in the glass (small bubbles) the gas may expand more than the glass. The pressure inside the gas bubbles could conceivably cause cracks. I always thought it was just the uneven heating of the glass that caused certain parts to expand more rapidly than cooler parts, causing differential forces over the glass surface.

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