Question
Sun March 15, 2015 By: Gargi Gupta

how can we say that solids expand on heating and contract on cooling?
 

Expert Reply
Hanisha Vyas
Mon March 16, 2015

Movement of the particles depends on the temperature. On increasing the temperature, the particles get energized and hence they start vibrating rapidly from their mean position. Therefore, the inter particle space increases and thus solid expands.

When the temperature is lowered, the particles lose their energy and thus inter particle space decreases and solid contracts.

 

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