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20 Cards in this Set
- Front
- Back
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System
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The specific part of the universe that is of interest to us.
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Heat
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The transfer of thermal energy between two bodies that are different temperatures
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Thermochemistry
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The study of heat associated with chemical reactions and physical processes
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Endothermic process
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a process that absorbs heat
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Exothermic
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a process that gives off heat
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open system
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A system that can exchange the mass and energy with its surroundings
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Closed Systems
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A system that can exchange energy (but not mass) with the surroundings
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Isolated system
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A system that can exchange neither energy not mass with the surroundings
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State Functons
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properties that are determined by the state of the system independent of how the state was achieved
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First law of thermodynamics
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the scientific study of the interconversion of heat and other kinds of energy
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Enthalpy
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A thermodynamic quantity defined by the equation H=U+PV
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Calorimetry
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The measurement of heat changes
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Specific heat
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The amount of heat required to raise the temperature of 1g of a substance by 1 degree C
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Heat capacity
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The amount of heat required to raise the temp of an object by 1 degree C
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Hess's law
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The change in enthalpy that occurs when reactants are converted to products in a reaction in the same whether the reaction takes place in one step our in a series of steps
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Standard enthalpy of formation
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is the enthalpy change associated with the formation of 1mole of a substance from its constituent elements, each in standard state.
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Bond enthalpy
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it's the energy required to break 1 mole of a particular type of bond
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Born-Haber cycle
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how to find lattice energy
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Standard enthalpy of reactions
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can be calculated for any reaction using tabulated standard enthalpies of formation of products and reactants
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Surrondings
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the part of the universe not included in the system
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