Question

Why does an ice bag filled with 0˚C ice stay cold for a much longer time than one filled with the same amount of water (liquid) at 0˚C?

A. Ice’s specific heat constant is less than liquid water’s specific heat constant.

B.Ice’s specific heat constant is more than liquid water’s specific heat constant.

C.Solid ice requires more heat (compared to the liquid water) in order for it to go through a phase change.

D.Solid ice requires less heat (compared to the liquid water) in order for it to go through a phase change.

Answer 1

Solution

Answer is:

C) Solid ice requires more heat (compared to the liquid water) in order for it to go through a phase change.

When ice is converted into liquid water, it acquires additional energy content called the ' latent heat '. This energy have to be provided to ice to get converted to water. Thus when compared to water at zero degree Celsius, ice lack this additional energy to get heated up. Hence it remains cold more time until it acquires this energy from its surroundings. Thus it will remain cold for much longer time compared to water at zero degree Celsius.