Thermochemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Endothermic reaction __ energy | absorbs
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| Exothermic reaction __ energy | releases
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| The first law of Thermochemistry is: | total energy of the universe is constant
-always being transferred, never created nor destroyed
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| Exothermic reaction has a __ delta H | negative
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| Endothermic reaction has a __ delta H | positive
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| The system is the ___ | reaction itself
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| The surroundings are __ | solution around the reaction
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| What is specific heat capacity? | amount of heat needed to raise temperature of 1 gram of substance by 1 degree of temperature
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| In endothermic reactions, bonds are __ | breaking
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| In exothermic reactions, bonds are __ | forming
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| What is internal energy? | the sum of kinetic and potential energies
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| In an endothermic reaction, heat goes from the _ to the __ | surrounding -- system
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| In an exothermic reaction, heat goes from the _ to the __ | system -- surrounding
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| At a constant pressure, enthalpy and heat are: | equal
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| Standard enthalpy is __ | deltaH at STP
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| Heat absorbed or released by a system at a given pressure and temperature is called ____ | enthalpy change
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| qsol = | -qrxn
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| Standard state for a liquid or solid is | 1 atm and 25C
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| Standard state for a solution is | 1M
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| For deltaH reactants, elements in standard state are ___ | 0
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| Units for heat capacity: | J degreeC
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| Units for specific heat capacity: | J/gC
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Created by:
Mariahj25
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