Imagine a container is removed from a hot oven and plunged into cold water. Which material would...

Question:

Imagine a container is removed from a hot oven and plunged into cold water. Which material would be more likely to have better thermal shock resistance?

Glass a = {eq}9X10^{-6} c^{-1} {/eq}

Pyrex a = {eq}4X10^{-6 }c^{-1} {/eq}

Pyrex

Pyrex is the brand name for a borosilicate glass introduced by Corning in 1915. It has a relatively low thermal expansion coefficient compared to regular glass due to the presence of boron oxide. It is popular not only as kitchenware but also as laboratory glassware.

Answer and Explanation:


Materials which have lower thermal expansion coefficients, α expand and contract less than materials with higher thermal expansion coefficients. This property provides them with better thermal shock resistance.

In this case, Pyrex has a lower thermal expansion coefficient than regular glass, therefore Pyrex has the better thermal shock resistance of the two.


Learn more about this topic:

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Thermal Expansion: Importance & Examples

from UExcel Physics: Study Guide & Test Prep

Chapter 11 / Lesson 8
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