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# Themodynamics

### Thermal Energy and Temperature

Absolute Zero The temperature when there is no kinetic energy; kinetic energy is zero: 0 Kelvin
Entropy Measure of disorder; measure of the “quality” of energy; forces energy to flow warm to cool
Expansion-Thermal The phenomenon of substances changing dimensions with temperature change
Heat Energy that transfers because of temperature difference
Heat capacity The amount of energy per mass per temperature change; ability of a particular substance to accept energy
Heat capacity-water 1 cal/g/C-degree; the highest capacity of any common substance
Temperature Indicates the average kinetic energy of the substance
Temperature: Celsius 0 – 100; water freezes; water boils;
Temperature: Kelvin 0 K = absolute zero; no kinetic energy; same degree size as Celsius
Temperature: Fahrenheit 0 F near ice/salt water slurry; 100 F originally = body temperature
Thermodynamics Thermo = heat; dynamics = flow; flow of heat energy
Thermodynamics-1st Law Heat added = increase in thermal energy + work done by the system; Statement of energy conservation
Thermodynamics-2nd Law Heat flows from only warmer to cooler objects; Also states that entropy of the universe always increases
Thermodynamics-3rd Law Absolute zero is impossible to reach; Perfect order is impossible to reach
Created by: brownglarry

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