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State functions

Work and Power

Subject: 
Physics
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Physics
Introductory physics
Physical quantities
Classical mechanics
State functions
Mechanics
Work
Force
Attachment theory
Energy
Social Issues
Labor

Work and Power Scientific Work Energy can be transferred into or out of a system by work Work: a measure of energy transferred into or out of a system by a force (F) acting over a distance(d) Work needs 3 key ingredients: force, displacement, and cause Work is only done when force acts upon an object to cause a displacement of the object Work is only done when components of a force are parallel to the object?s displacement Examples: a teacher applying a force to a wall becomes exhausted NOT WORK no displacement A book falls off a table and free falls to the ground NOT WORK no force to cause displacement a rocket accelerates through space WORK A force causes a displacement

Metric System

Subject: 
Chemistry
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Chemistry
Measurement
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Thermodynamics
State functions
Heat transfer
Physical quantities
Units of energy
Calorie
International System of Units
Food energy
Heat capacity
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Metric System
Joules
Kelvins

Conversions Regarding the Metric System and some Associated Formulas By Toomuchswag Sources: My Chemistry Notes and http://www.simetric.co.uk/siprefix.htm for some verification Most of the world besides the United States uses the metric system, a much simpler measuring tool according to many. The Metric system works in powers of ten: The prefixes work like this: Kilo Hecto Deca R (this is the regular unit, be it meters, grams, etc. we have given it the letter R) Deci Centi Milli Some important formulas: Density: Mass/Volume 1calorie or cal is the amount of energy required to raise the temperature of water by 1 degree Celsius

Gas Laws Notes

Subject: 
Chemistry
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Units of pressure
Measurement
Physics
Atmospheric thermodynamics
Thermodynamics
Underwater diving
State functions
Torr
Pascal
Pressure
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Pressure
Volume
Temperature
Charles' Law
Properties of Gases
Effusion
Graham's Law of Effusion

Gas Laws Properties of Gases Fluids Low density Highly compressible Completely fill a container and exert pressure in all directions Pressure the force exerted per unit of area Units of pressure: kilopascal (kPa) atmosphere (atm) torr (torr) millimeters of mercury (mmHg) pounds per square inch (psi) 1 atm = 760 mm Hg = 760 torr = 101 kPa Pressure and Volume How are pressure and volume of a gas related? Think about the demos yesterday. What are the words we use for this relationship? What would a graph look like? Pressure and Volume Boyle?s Law: the volume of a certain mass of gas at constant temperature is inversely proportional to the pressure applied to the gas P1V1 = P2V2 P V

Reactions and Enzymes

Subject: 
Biology
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Thermodynamics
Chemical thermodynamics
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State functions
Thermochemistry
Endergonic
Exergonic reaction
Exergonic
Energy
Entropy

Endergonic and exergonic | Back to Top Energy releasing processes, ones that "generate" energy, are termed exergonic reactions. Reactions that require energy to initiate the reaction are known as endergonic reactions. All natural processes tend to proceed in such a direction that the disorder or randomness of the universe increases (the second law of thermodynamics). Time-energy graphs of an exergonic reaction (top) and endergonic reaction (bottom). Images from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com), used with permission. Oxidation/Reduction | Back to Top

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