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chapter 9 notes tka

chapter 9 notes part one

QuestionAnswer
Heat flows from... hot to cold
To lower a object's heat content... we have to have a cooler thing for the heat to flow to.
Kinetic-Molecular model states... Atoms, molecules, ions, and subatomic particals are in constant motion, and therefore have kinetic energy.
to get the total internal energy of matter... add the potential energies and the kinetic energies together.
the thermal energy of a system is... the sum of all the kinetic energies of its particals. Thermal energy is only part of the internal energy.
thermal energy can only be measured... as it is transferred from one system to another.
when you measure thermal energy, you are measuring... the change in temperature of the system.
when you are heating an object, what happens is... the hotter moecules hit the cooler molecules, making them move at a faster rate.
when molecules start moving more... they are gainning kinetic energy, thus increasing your thermal energy and your temperature.
loos of thermal energy is accompanied by... falling temperatures
a gain of thermal energy is accompanied by... rising temperatures.
the temperature of an object is directly related to... the average kinetic energy of its atoms and molecueles.
temperature is measured using... a thermometer.
thermometers work by... measuring the expansion of liquid or metal when it gets hotter and gains thermal energy.
Gabriel Fahrenheit in 1714... created the Farrenheit scale.
Andres Celsius in 1742... created the Celsius scale.
Lord Kelvin in 1848... created the Kelvin scale.
the advatige of Kelvin is... there are no negative values because the lowest temperature is absolute zero.
Thermal expansion happens... on the partical level.
thermal expansion happens when... particals gain energy and can move away from each other more, and as a result, the object gets bigger or expands.
Electrical resistance increases with... increasing temperature because electrons move more randomly.
Electrical resistance is a way to measure... how well electricity is conducted.
Viscocity is the measure... of the resistance of liquids to flow.
viscocity decreases with increasing... temperature.
the more viscous a liquid is... the slower it flows.
heat is... the quantity of thermal energy that flows from one place to another.
heat transfers t
Created by: kevingurl
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