How much energy is required to melt #7.3g# of ice at #0^circC#?

1 Answer
1s2s2p
May 16, 2018

#2.4kJ#

Explanation:

When a substance is being heated or cooled at its boiling or melting point, its temperature will stay constant for a moment, this is because energy is being used to actually melt or boil the substance than to make the molecules move faster.

This is given by:
#DeltaE=LDeltam#, where:

  • #DeltaE# = change in energy (#J#)
  • #L# = latent heat (#J# #kg^-1#)
  • #Deltam# = change in mass (#m#)

Specific latent heat of fusion (or melting) for ice/water is #334J# #g^-1#

#Deltam=334*7.3~~2,400J=2.4kJ#

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