Thermochemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Elements in standard state are | 0
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| Energy added between phase changes goes towards | changing temperature (kinetic energy)
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| Specific Heat Capacity | the amount of heat needed to change 1 gram substance to 1 degree celsius
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| Specific Heat Capacity Allows | you to relate energy, temp change, and amount of a substance
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| Substances with high specific heat are more | resistant to changes in temperature
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| Water | has the highest specific heat
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| C | heat capacity
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| c(s) | specific heat capacity
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| Heat Capacity | the quantity of energy in joules needed to change the temperature of a substance by one degree celsius
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| Enthalpy Change | the difference between the potential energy of the reactants and the products during a physical or chemical change
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| Calorimetry | measurement of heat flow (follow law of conservation of energy)
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| Heat lost by one | = heat gained by another
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| Calorimeter | apparatus that measures heat flow
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| Standard Molar Enthalpy Of Formation | the energy released or absorbed when one mole of a compound is formed directly from the elements in their standard states
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| Enthalpy Of Vaporization | the amount of energy required to convert 1 mole of a substance from the liquid phase to the gas phase
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| Sublimation | the direct vaporization of a solid without passing through it's liquid state
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| An endothermic reaction corresponds to one in which | delta H is positive and heat is absorbed
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| Radiant Energy | comes from the sun and is earth's primary energy source
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| Thermal Energy | the energy associated with the random motion of atoms and molecules
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| Chemical Energy | energy stored within the bonds of chemical reactions
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| Potential Energy | the energy available by virtue of an object's position
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| Thermochemistry | the study of the energy transfers that happen during chemical reactions
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| For two molecules to react | they must come in contact or collide
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| Activation Energy | the initial energy investment it takes to make a reaction happen, even if the reaction releases energy
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| Rate Influencing Factors | surface area
temperature
concentration
presence of catalysts
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| Energy Of The Forward Reaction | Arrow B
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| Energy Of The Activated Complex | Arrow D
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| Heat Of Reaction (enthalpy change) | Arrow C
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| Activation Energy Of Backward Reaction | Arrow E
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| What would likely happen if you were to touch the flask in which an endothermic reaction were occurring ? | The flask would probably feel cooler than before the reaction started
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| By what quantity must the heat capacity of an object be divided to obtain the specific heat of that material? | Mass
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Created by:
jordinlevy
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