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20 Cards in this Set
- Front
- Back
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flammable
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easily ignited, burns rapidly
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chemical changes
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occur when atoms of different substances break apart and combine in different ways
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nuclear changes
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occurs when an atoms nucleus emits or absorbs a nuclear particle or ray. splitting the nucleus into smaller nuclei is also a nuclear change |
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physical properties
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anything about a substance we can observe or measure without changing its chemical composition
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physical changes
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change in the arrangement of the matter of a material or object |
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chemical properties
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those which/how change when in contact with other substances
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chemical changes |
atoms of different substances break apart and combine in different ways |
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the law of conservation of matter |
[under normal circumstances] |
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melting
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the temperature at which a pure solid turns into its liquid |
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freezing
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temperature at which a liquid goes to a solid
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vaporization |
process where either a solid or a liquid changes directly into a gas |
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rate of vaporization |
[temperature [pressure |
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vapor pressure |
molecules speed up with the increased temperature causing pressure to build |
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boiling |
rapid vaporization that occurs when a liquids vapor pressure exceeds atmospheric pressure and the static pressure in the liquid, causing it to form vapor bubbles
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evaporation
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when a liquid is in between its melting and boiling point
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sublimation |
when a solid seems to evaporate
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condensation |
opposite of vaporization vapor ~ = liquid |
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deposition
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opposite of sublimation vapor > solid |
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boiling occurs
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>at boiling point temperature >throughout the liquid |
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evaporation occurs
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>at any temp between the melting and boiling points >only at the liquids surface |
