9(a)
(i) Heat supplied to a solid change it into liquid. What is this change in phase called?
(ii) During the phase change does the average kinetic energy of the molecules of the substance increase?
(iii) What is the energy absorbed during the phase change called?
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(i) The change of phase from solid to liquid on heating is called melting.
(ii) No, the average kinetic energy of the molecules does not change during the change of phase.
(iii) The energy absorbed during the phase change is called latent heat.