are endothermic
the reverse are exothermic
Source: http://answers.Yahoo.com/question/index?qid=20081022202228AAFplBc
freezing, condensation, and deposition.
freezing: liquid --->solid
condensation: gas --->liquid
deposition: gas --->solid
water placed in the freezers forms ice cubes
Freezing... glad i could help
They are physical changes
This is called a change in the physical state of the substance. For example formation of ice from water is a change in the physical state of water.
During an experiment a substance may undergo a change of state.
Melting is a phase change in which a substance changes from the solid state to the liquid state. Changing phases is also a physical change.
Changes in state can occur when a substance is heated, cooled or even if an external pressure change occurs.
It does not change for @pex
change of state
change is complete
Change of state of a substance is a physical property!
One possibility is a change in state.
change of state
physical change
This is called a change in the physical state of the substance. For example formation of ice from water is a change in the physical state of water.
After a physical change a substance does not change its chemical composition it simply changes its state as, water to ice or vapours.
One possibility is a change in state.
Change the temperature or pressure or both, to change a substance from one state to another. (such as gas to liquid)
The change of state is called sublimation.
The change of state is called sublimation.