Explain the difference (energetically) between the of melting and freezing of a substance?

Freezing a substances makes the molecules move slower , melting a substances makes the molecules move faster

Explanation:

Freezing a substance for example a ice cube. the molecules are in a smaller space and unable to move around as much. Melting a substances lets say you place the icecube under heat on a plate. The molecules are getting heat and on a plate allowing them to spread out. More heat applied to the molecule allows them to move faster.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml