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19 Cards in this Set
- Front
- Back
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thermodynamics |
heat and other forms of energy |
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thermochemistry |
heat absorbed or evolved by a chemical reaction |
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energy |
potential or capacity to move matter -electromagnetic -mechanical -electrical -chemical |
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kinetic energy |
energy based off motion |
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potential energy |
energy based off position ( in a field of force) ex: gravitational, electrical, magnetic |
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internal energy, u |
kinetic and potential energy of particles that make up substance |
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heat capacity, C |
of a sample of substance -quantity of heat needed to raise the temperature of the sample of substance by 1 degree C (or Kelvin)
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Molar Heat Capacity |
Heat capacity for 1 mol of substance |
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Specific Heat Capacity, s |
AKA specific heat - Quantity of heat needed to raise the temperature of one gram, of substance by 1 degree C (or K) at constant pressure -using: heat capacity |
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manipulating a thermochemical egn. |
-when the eqn. is multiplied by a factor, the value of change H must also be multiplied by it -when a chem. eqn is reversed |
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thermochemical equation |
chem. eqn. for a reaction - include phase labels and enthalpy of reaction after eqn. |
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Law of conservation of energy |
energy may be converted from one form to another, but total energy remains constant -2 parts: Thermodynamic system and surroundings |
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Heat, q |
-energy that flows into or out of system (is Temp. differential) due to a diff. in temp. between system + surroundings. high--->low |
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endothermic |
q (+) heat is absorbed by system. -applied to reaction, system, beaker etc. |
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exothermic |
q (-) heat is evolved by system |
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Heat of Reaction |
(specific value) -value of q required to return a system to the given temp. at completion of reaction |
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Heat of Reaction |
(specific value) -value of q required to return a system to the given temp. at completion of reaction |
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Enthalpy, H |
Extensive Property (dependent on how much you have) used to obtain heat absorbed/ evolved in a chem. reaction |
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state function |
property of system that depends only on present state |
