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10 Cards in this Set
- Front
- Back
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first law of thermodynamics |
essentially the law of conservation of energy applied to a thermodynamic system |
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exchanges of energy B/N the system and the surroundings |
1) heat, q and work, w |
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sign convention for q heated by system |
decreasing u of the system |
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heat is absorbed by system, q (+) |
increases the internal energy of system |
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spontaneous process |
physical or chemical change that occurs by itself and it continues until it reaches equilibrium |
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when the system expands |
change V is (+), so w is (-) |
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when the system contracts |
change V (-), so w is (+) |
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thermodynamic QTN |
that is measure of how dispersed the energy of a system is among the different possible ways that system can contain energy |
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entropy |
is a state function -is an extensive property -is measured in J/K -measures dispersal - change S = Sf-Si |
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second law of thermodynamics |
the total energy of a system its surroundings always increases for a spontaneous process |
