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Cards In This Set
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1st law of thermodynamics
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The total energy of the universe is constant
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2nd law of thermodynamics
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The total entropy of the universe is always
incresing
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3rd law of thermodynamics
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The entropy of every pure perfectly formed crystalline substance at absolute zero is zero
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A negative delta H is what kind of reaction?
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Exothermic
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A positive delta H is what kind of reaction?
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Endothermic
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Definition of entropy
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Measure of disorder
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4 rules of entropy
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1. gases have greater entropy than liquids
2. liquids have greater entropy than solids 3. entropy of a system increases as temp increases 4. in a chemical reaction the side with more mols has greater entropy |
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Thermochemistry
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The heat changes that occur during chemical reactions
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Energy
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The capacity for doing work or supplying heat
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What is the energy stored in chemical bonds called?
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Chemical potential energy
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Heat
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Energy that transfers from one object to another becuase of a temperature difference between them.
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Calorie
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The quantity of heat needed to raise the temp of 1g of pure water 1 degree C
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Kilocalorie
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Equal to 1000 calories
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Joule
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The SI unit of heat and energy named after the English physicist James Prescott Joule
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How many joules in 1 calorie?
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4.184 Joules
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