Question #0f0c8

1 Answer
P dilip_k
Sep 14, 2016

Given
#"The density of ice "=0.92gcm^-3#

#"The density of water "=1gcm^-3#

If we have #92g# ice ,it will have volume# 92/0.92cm^3=100cm^3#
On melting this #92g# ice we will get #92g# water having volume #92/1=92cm^3#.
So #100cm^3# ice contracts to #92cm^3# water on melting. Again application of pressure always tries to contract the volume.

So in respect of contraction in volume the application of mechanical energy (Pressure) and and application of heat energy are unidirectional (i.e.one helps another).Hence application of pressure helps melting as less heat energy is needed for melting under application of pressure (the mechanical energy).

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