Change of Phase part 3. Sublimation When go directly to the phase Object must in order to bypass liquid phase i.e. dry ice, moth balls, old air fresheners.

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Presentation transcript:

Change of Phase part 3

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

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

It takes about to the temperature of ice by For a piece of -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

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

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 =

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?

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

read pp349 – 350