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30 Cards in this Set
- Front
- Back
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What is temeprature |
All bodies posses it (Measure of internal energy of the object) |
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convert between C and K |
C = k-273 |
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Convert between C and F |
F = (9/5)C + 32 |
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What does heat cause solids' size to do |
Increase in size |
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How do you calculate thermal expansion |
ΔL = αL0ΔT |
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How do you calculate volume expansion |
ΔV = βVoΔT |
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As tempertature increases what happens to internal energy |
Increases |
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What are the three modes of heat transfer |
*conduction *Convection *Radiation |
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What is conduction |
Direct transfer from molecule to moelce through collisions |
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What are the best conductors |
Metals |
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What are the worst conductors |
Gases |
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What is convection |
Transfer of heat by physical motion of heated material in fluids (Liquids and gas) |
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Do heated particles rise or sink |
Rise |
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Do cooler particles rise or sink |
Sink |
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What is radiation |
Transfer of heat by EM waves and allows transfer of heat through vacuum |
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How do you calcualte the specific heat? |
Q = mcT |
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How do you find pressure |
Force (perpendicular) / Area |
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What are the units of pressure? |
Pascal |
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How much pascal is in 1 atm |
1.013 * 10^5 Pa |
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If the piston is moving up is work done by the system or on the system |
By |
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If the piston moves down is work done on the system or by the system |
On |
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What is the equation of work for an isobaric system |
PΔV |
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What is the equation for the first law of thermodynamics |
ΔU = Q- W |
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Is work done by the system postiive or negative |
+ |
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Is work done on the system positive or negative |
- |
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Is heat into the system postive or negative |
+ |
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What does adiabatic mean? |
Q = 0 |
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What does it mean for a closed cycle? |
ΔU = 0 So Q=W |
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What does the 2nd law of thermodynamics state |
Entropy of the system and enviornment together will either increase or stay the same Will not change during a totally reversible process but will increase during an irreversible process |
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How to calculate entropy |
ΔS=Q/T |
