Energy
Unit for energy
Joules
A measure of the average kinetic energy (random motions) of the particles in a sample, units: C, K
Temperature
When two objects _________ they transfer energy.
Collide
1 Cal= ____________cal
1000 cal
Flow of energy due to a temperature difference, SI Unit is Joules, represented by Q
Heat
Heat flows from ________ to ________.
Hot to cold
1 cal = ____________ Joules
4.184 Joules
Endothermic or Exothermic?
Release of heat, gives out energy from a system to its surroundings
Exothermic
The minimum amount of energy that a reaction needs to occur
Activation energy
The three components to make a fire
Fuel, spark, and oxygen
Endothermic or Exothermic?
Absorption of heat, takes in energy from its surroundings
Endothermic
Because humans use energy for different purposes, the energy goes through many kinds of _________.
Conversions.
The ability to do work or produce heat
Energy
If the products have less energy than the reactants, and energy gets released, then the reaction is (endothermic/exothermic).
The reaction is exothermic
Everything else in the universe outside of a system
surroundings