Energy
The a ility todo work or produce heat
Temprature
Is a measure of the average kinetic energy (random motions) of the particles in a sample, units: C, K
Calorie (cal)
Amount of energy required to raise the temperature of 1g of pure H2O by 1 C
Enthalpy
The heat content of a system at constant P
Calorimetry
The measurement of the heat into or out of a system for chemical and physical processes
Potential Energy
Due to the composition or position of an object (stored energy)
Heat
Flow of energy due to a temperature difference, SI Unit is J, represented by q
1 cal
4.184 J
Changes in Enthlpy
ΔH
Calorimeter
An insulated device used for measuring the amount of heat absorbed or released during a chemical reaction.
Kinetic Energy
Energy of Motion
Exothermic
Release of heat, gives out energy to its surroundings
1J
0.239 cal
DeltaHis Negative
Exothermic reaction
Is a balanced equation that includes the physical states of all reactants/products and the energy change, expressed as deltaH(change in enthalpy) per mole.
Thermochemical Equation
Law of conservation of energy
States energy can be converted from one form to another but can be neither created nor destroyed
Endothermic
Absorption of heat, takes in energy from its surroundings
Thermochemistry
The study of heat changes that accompany chemical reactions and phase changes
Endothermic reaction
Is the enthalpy change for the complete burning of one mole of the subtance.
Enthalpy(heat) of Combustion (deltaHcomb)
Chemical Potential Energy
Energy that is stored in chemical bonds
If the products have less energy than the reactants, energy released
The reaction is exothermic
System
The part of the universe that contains the reaction you want to study
surroundings
Everything else in the universe
DeltaHsolid, the heat lost when a liquid changes to a solid at a constant temperature
Heat of condensation