Which of the following statements are true as a block of ice melts?

The temperature of the ice/water system increases.

Heat energy enters the ice/water system.

The temperature of the ice/water system remains constant. Heat energy leaves the ice/water system.

The temperature of the ice/water system decreases.

It takes heat energy to turn ice at 0°C into water at 0°C.

- - You start off with a block of ice.

- - Some heat energy hits the ice, the ice absorbs it, a little bit

of ice melts, and a puddle forms around it. Now you have an

ice/water system, all at 0°C.

- - If no more heat comes in from somewhere, then no more

ice can melt.

- - When some more heat energy comes in, some more ice

can melt, and become liquid at 0°C.

- - As heat comes in, more and more ice melts. The temperature

of the whole system remains constant. Any heat that comes in

is used to change the state of some ice from solid to liquid, with

no temperature change.

- - Finally, when all of the solid is gone, any more heat energy

begins to raise the temperature of the water.