Thermochemistry 1 - Energy Transfer Flashcards
temperature definition
the average kinetic energy of particles
heat definition
the overall thermal energy in a smaple
What is heat dependent on?
- temperature
- number of particles
- type of particles
open system definition
both energy and matter be exchanged with surroundings
closed system definition
only energy can be exchanged with surroudings
isloated system definition
neither energy nor matter can be exchanged with surroundings
thermochemistry definition
the study of energy changes that accompany physical and chemical changes
exothermic definition
referring to a system that gives off heat
endothermic definition
refering to a system that absorbs heat from its surroundings
first law of thermodynamics
the total energy in the universe is constant
therefore, the changes in the energy of the universe is zero
Energy is always transferred from an object of higher temperature to an object of lower temperature
when does energy transfer stop?
when the objects involved are all at the same temperature
what are the heat transfer methods?
- conduction
- convection
- radiation
what is conduction?
transfer through direct touch -> mainly solids
what is convection?
transfer of energy through fluid (air/liquids)
