Thermochemistry - Energy and Energy Changes Flashcards
Energy
the capacity to do work or transfer heat
law of conversation of energy
the total amount of energy in the universe is constant
kinetic energy equation
Ek = 1/2mu^2
- m = mass of object in kg
- u = velocity in m/s
electrostatic energy
energy that results from the interaction of charged particles
electrostatic energy formula
Eel (proportionality) Q1Q2/d
- Q1Q2 = two charges
chemical energy
energy stored within the chemical structure
system
a part of the universe that is of specific interest
surroundings
the rest of the universe outside the system
universe
system + surroundings
thermochemistry
study of heat in chemical reactions
heat
transfer of thermal energy; either absorbed or released during a process
exothermic process
heat is transferred from the system to the surroundings; Gives off heat
endothermic process
when heat is transferred from the surroundings to the system; Absorbs heat
