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Intro. To I S
Devlin-PNHS-Intro to I.S. Vocab
Question | Answer |
---|---|
What is a solid? | The state of matter in which a substance has a definite shape and volume. |
What is a liquid? | The state of matter in which a substance has a definite volume, but not a definite shape. |
What is a gas? | The state of matter in which a substance has neither a definite shape or volume. |
What is kinetic energy? | The energy an object has due to its motion. |
What is pressure? | The result of force distributed over an area. |
What is absolute zero? | A temperature of 0 Kelvins. |
What is "Charle's Law"? | The direct proportion of a gas to its temperature (in Kelvins) if the pressure and number of particles of the gas are constant. |
What is "Boyle's Law"? | The inverse variation of the volume of a gas with a pressure if the temperature and the number of particles are constant. |
What is a phase change? | A reversible physical change that occurs when a substance changes from one state of matter to another. |
What does "endothermic" mean? | A description of change in which a system absorbs energy from its surroundings. |
What is "heat of fusion"? | The amount of energy absorbed. Measured in joules. |
What does "exothermic" mean? | A description of change in which a system releases energy to its surroundings. |
What is vaporization? | The phase change in which a liquid turns into a gas. |
What is evaporation? | The process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point. |
What is vapor pressure? | The pressure caused by collisions of particles in a vapor with the walls of a container. |
What is "heat of vaporization"? | The energy a substance must absorb in order to change from a liquid to a gas. |
What is condensation? | The phase change in which a substance changes from a gas or vapor into a liquid. |
What is sublimation? | The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first. |
What is deposition? | The phase change in which a gas or vapor changes into a solid without changing into a liquid first. |