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Classified in Chemistry
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law of conservation of E
in interactions between a system and its surroundings, energy cannot be created or destroyed.
open system
freely exchanges matter and energy with its surroundings.
closed system
only exchanges energy with its surroundings.
isolated system
no interactions with surroundings.
potential energy
E due to composition/ position of object.
kinetic energy
E of motion.
temperature
reflects random motions of the particles. Indicates direction of heat energy flow.
heat
transfer of E between two objects due to temperature difference.
specific heat
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celsius.
the system
part of the universe that contains the reaction/ process you wish to study.
the surroundings
everything in the universe other than the system.
endothermic
Absorbs heat
Exothermic
Releases heat
phase change
represent the heat required to change the state of 1 mol of a substance.
latent heat
occurs when thermal E absorbed or released but no temp change occurs, happens at a phase change.
Enthalpy
The heat content of a system at constant pressure