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PS chapter 9
| Question | Answer |
|---|---|
| Heat flows from ____ to ______. | Hot, cold |
| The reason why atoms, molecules, ions, and subatomic particles are in constant motion. | Kinetic-molecular model |
| Total Internal Energy = | Potential energy + Kinetic Energy |
| Thermal energy = | sum of all kinetic energies of its particles. |
| How is Thermal Energy measured? | as it is transferred from one system to another. |
| What happens when you gain kinetic energy? | You increase your thermal energy and your temperature. |
| What happens when molecules move faster? | they gain kinetic energy. |
| Transferring particle kinetic energy is called? | heating and cooling. |
| loss of thermal energy = | falling temperature |
| gain of thermal energy = | rising temperature |
| what is related to the AVERAGE kinetic energy pf its atoms and molecules? | the temperature of an object |
| what were the 2 initial boiling and freezing points called in the Fahrenheit scale? | the fiducial points |
| thermal expansions happens where? | on the particle level. |
| Thermal energy is? | When something is cooled or heated and expands or contracts. |
| this increases with increasing temperature because of electrons moving more randomly. | Electrical resistance |
| the measure of the resistance of liquids to flow. | Viscosity |
| Heat is? | the amount of thermal energy flowing from one place to another. |
| The 3 ways heat is transferred. | Conduction, convection, radiation. |
| Conduction is? | the transfer of heat when 2 objects touch each other |
| What is the chief process that thermal energy moves through solids? | Conduction |
| Convection is? | heat transferred through liquids. |
| Radiation is? | heat transferred through outward sources. |
| what does thermal energy most efficiently move through to get radiant energy? | a vacuum |
| what is the best insulator? | a vacuum |
| Insulators are? | materials that resist the flow of thermal energy. |
| Heat capacity is? | relationship between the amount of thermal energy absorbed and the temperature change caused by this. |
| specific heat is? | the amount of thermal energy that must be gained or lost to change the temperature of 1 g of the substance. |
| Latent heat of vaporization is? | the amount of heat it takes to change a liquid to a gas. |
| Latent heat of fusion is? | amount of thermal energy exchanged per gram of material during melting or freezing. |
| Ohase change from liquid to solid | freezing |
| phase change from solid to liquid | melting |
| phase change from gas to liquid | condensation |
| liquid change from liquid to gas | vaporization |
| change from solid to gas, skipping liquid phase. | sublimation |
| change from gas to solid, skipping liquid phase. | deposition |
| Triple point, | temperature and pressure point which solid, liquid, and gas phases exist at the same time. |
| Critical point is | temperature above where a substance will always be a gas regardless of the pressure. |
| temperature at which the solid and liquid phases of a substance are in equilibrium at atmospheric pressure. | freezing point |
| temperature at which vapor pressure of a liquid is equal to the pressure on the liquid. | Boiling point |
Created by:
rachel_35
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