What is a phase change? - when matter changes from one form to another due to the addition or removal of heat.

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Presentation transcript:

What is a phase change? - when matter changes from one form to another due to the addition or removal of heat

Examples of phase changes: EVAPORATION CONDENSATION MELTING BOILING FREEZING SUBLIMATION

Phases of Matter

Kinetic Theory of Matter -All molecules are in constant motion -As temperature increases so does the rate at which molecules move and vis versa At what temperature, theoretically, does all molecular motion stop? Temperature scales: Kelvin Fahrenheit Celsius Boiling: Freezing:

Freezing point The temperature at which a liquid changes into a solid. Freezing point is 0◦C

Melting point The temperatures at which the solid form of the element becomes a liquid. The melting point of water is 0 degrees Celsius

Boiling point The boiling point of an element or compound is the temperature at which it goes from a liquid to a gann the boiling point of water is 100 degrees Celsius.

Condensation Point The temperature at which a substance goes from a gas to a liquid An objects boiling point and condensation point are the same 100◦C

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