Describe the flow of energy when a substance freezes and melts?

Question

provide an exaple of each process

Answer 1

substance freezes: energy from substance to surroundings: water freezing to make ice

substance melts: energy from surroundings to substance: ice melting to make water

Answer 2

when a substance freeses it losses heat energy to the surroundings. this leads to decreasing of the kinetic energy of the molecules and they start coming close to each other. thus they from a solid bonding for example water freezing to form ice

when a substance melts it gains energy from the surrondings. on gaining heat energy from the surroundings the kinetic energy of the molecules increases and they start moving very fast about their mean positions. in doing so the spaces between them increases and so the force of attraction between them decreses and hence the form a liquid. example ice melting to form water.

you will notice upon gaining energy, say water boiling, it wont show rise in temparature above 100 degree celcius which is its boiling point. now we know that it is consuming energy but it is not visible where the energy is going. this energy is actually used to change the state of matter....

Answer 3

when something freezes, the heat energy (and yes, there is heat energy) is loss, like when water turns into ice.

when something melts. the heat energy is gained, like when ice melts...