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Chemistry

Thermochemistry

QuestionAnswer
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