1. Change of Phase part 3

2. Sublimation When go directly to the phase Object must in order to bypass liquid phase i.e. dry ice, moth balls, old air fresheners

3. Energy and Changes of Phase can be a substance to solid->liquid->gas can be from a substance to change its phase gas->liquid->solid

4. It takes about to the temperature of ice by For a piece of ice @ -50°C, temperature steadily increases until 0°C At 0°C, energy is, but temperature does not ; heat melts ice of heat needed to this ice completely Ice -> water

5. Water -> steam After ice completely, temperature then continues to Every raises temperature by until 100°C Then temperature is as water becomes steam of heat needed to whole When all steam = 100°C, temperature continues to rise

6. This process can work in reverse Instead, energy is released SO… Steam to boiling water = Water  from 100  C to 0  C = Water  to ice =

7. Solid energy when it ; a liquid energy when it A gas energy when it ; a liquid energy when it Under some conditions, hot water will freeze faster than warm water (but not faster than cold water) Why?

8. Firewalkers Primary reason not burned: Secondary reason not burned: BOTH and plays a role

9. read pp349 – 350