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12 Cards in this Set
- Front
- Back
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The Law of Conservation of Mass |
In a chemical reaction that takes place than a close system the mass reactants must be equal to the mass of the products |
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System def. |
A part of the universe being studied in a particular situation |
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Closed system |
System where nothing can enter or leave |
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Open system |
A system where things can enter or leave |
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Enthalpy Definition |
Heat content; energy in form of heat |
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Enthalpy change def and symbol |
Difference in heat content between products and reactants
/\H |
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Enthalpy change formula |
/\H= Hproducts-Hreactants |
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Exothermic Reaction |
- EXIT -energy released -vessel feels hot and warm -change in H is negative - bonds are formed
Curve is like negative slope (starting w/ two separate elements) |
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Endothermic Reaction |
-ENTER - energy is absorbed - vessel feels cool and cold - change in H is positive - bonds are broken - kJ is on reactant half of equation
Drawing starts w/ compound and splits up |
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Solid to liquid is: |
Endothermic because adding heat |
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Solid to liquid is: |
Endothermic because adding heat |
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Gas to liquid is: |
Exothermic because losing energy (high to low energy) |
