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18 Cards in this Set
- Front
- Back
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Systems |
Any sample under observation |
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Surroundings |
Everything else in the universe |
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Open system |
Energy and matter can be exchanged between the system and the surroundings |
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Closed system |
Matter cannot be exchanged but energy can |
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Isolated system |
Neither energy or matter can be exchanged |
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Q |
Heat (J/Kj) |
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M |
Mass (g) |
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C |
Specific heat capacity (J/g•m) |
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∆T |
Change in temp (°C) Tfinal - Tinitial |
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Enthalpy |
Heat content (∆H) *∆H=Q |
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endothermic |
∆H is positive heat enters the system |
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Exothermic |
Heat leaves the system |
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Phase Change |
energy is used to change between states of matter |
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∆H° |
Assume standard conditions |
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∆Hr |
Enthalpy change of reaction |
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∆H°comb |
Ethalpy change of combustion |
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∆Hr= n • ∆H°r |
∆Hr = change of ethalpy in a specific reaction n = moles ∆H°r= given change of ethalpy per mole |
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M |
Molar mass |
