Question

When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice during melting:
A. increase very slowly
B. does not increase at all
C. first remains constant then decrease
D. none of the above.

Answer 1

Hint: Matter is anything that has some mass and occupies space. There are three states of matter known by the name solid, liquid or gas. These states can be differentiated on many bases but the important one is arrangement of molecules.

Complete answer:
In case of solid the molecules are tightly held together with strong intermolecular forces of attraction due to these strong forces solid have definite shape and volume here ice is also an example of solid state whereas intermolecular forces in liquid is less as compared to solid but high as compare to gas that’s why liquid have tendency to flow and they do not have any definite shape.
Hence to turn solid ice into liquid water what we have to do is push the water molecules which are tightly held with each other and break them from the framework or crystalline structure in which they are arranged. So when ice is melting we can state it is changing from solid to liquid then all the heat energy we supply is being used to separate molecules and none is left over for raising the temperature.

This suggests that option B is the correct answer.

Note:
The heat which is needed to change a solid into a liquid is known as latent heat of fusion and the process in which solid gets converted into liquid is known as melting process and the point at which it converts into liquid is known as melting point.