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