Questions
Solids expand on heating because
detailed solution
Correct option is D
The expansion of solids can be well understood by potential energy curve for two adjacent atoms in a crystalline solid as a function of their internuclear separation (r).At ordinary temperature : Each molecule of the solid vibrate about its equilibrium position P1 between A and B (r0 is the equilibrium distance of it from some other molecule)At high temperature : Amplitude of vibration increase (C D and E F). Due to asymmetry of the curve, the equilibrium positions (P2 and P3) of molecule displaced. Hence it's distance from other molecule increases (r2 > r1 > r0).Thus, on raising the temperature, the average equilibrium distance between the molecules increases and the solid as a whole expandsTalk to our academic expert!
Similar Questions
There is a rectangular metal plate in which two cavities in the shape of rectangle and circle are made, as shown with dimensions. P and Q are the centres of these cavities. On heating the plate, which of the following quantities increase?
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