# Is there a gain or loss of thermal energy in freezing?

## Is there a gain or loss of thermal energy in freezing?

The change from the liquid state to the solid state is called freezing. As the liquid cools, it loses thermal energy. As a result, its particles slow down and come closer together.

## Where does energy go when you boil water?

During boiling, heat is being added to the liquid. The added energy goes to overcoming the intermolecular forces of attraction holding the water molecules together as a liquid, increasing the distance between molecules – the potential energy of the system increases.

## What is energy required for the boiling process?

The energy required to change water from a liquid to a solid is 333.7 kJ/kg while the energy required to boil water is 2257 kJ/kg.

## Why does boiling take up a lot of energy than melting?

Because the heat of vaporization is higher than the heat of fusion. It takes more energy to break the attraction between liquid phase molecules into gas then it does between solid phase molecules into liquid.

## Where does the heat energy come from to melt an ice cube which is left on a kitchen work surface?

The ice left on a kitchen work surface obtains heat energy from its environment and thus, melts. Explanation: Any temperature above 0 degree C is not in freezing point and is the melting point of ice. Above this temperature, the ice melts as the room temperature will be higher than 0 degree C.

## Does the size of an ice cube affect how fast it melts?

Results: The larger the surface area of the ice cube the more heat it absorbs, so the spherical ice cube will melt the slowest if it has the least surface area.

45 to 60 minutes

12 hours

## Will an ice cube melt in the fridge?

Any normal fridge, yes, it will melt so put it on a towel. However, if you have a super-duper-high-pressure-handling-contraption, then yes it will stay ice!

## How long would ice last in a fridge?

Dry ice stored in a cooler will last for 18-24 hours, other storage times and conditions are listed below.