Energy
Heat
Calorimetry

Enthalpy
Definitions
100

Energy

The a ility todo work or produce heat

100

Temprature

Is a measure of the average kinetic energy (random motions) of the particles in a sample, units: C, K

100

Calorie (cal)

Amount of energy required to raise the temperature of 1g of pure H2O by 1 C

100

Enthalpy

The heat content of a system at constant P

100

Calorimetry

The measurement of the heat into or out of a system for chemical and physical processes

200

Potential Energy

Due to the composition or position of an object (stored energy)

200

Heat

Flow of energy due to a temperature difference, SI Unit is J, represented by q

200

1 cal

4.184 J

200

Changes in Enthlpy

ΔH

200

Calorimeter

An insulated device used for measuring the amount of heat absorbed or released during a chemical reaction.

300

Kinetic Energy

Energy of Motion

300

Exothermic

Release of heat, gives out energy to its surroundings

300

1J

0.239 cal

300

DeltaHis Negative

Exothermic reaction

300

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

400

Law of conservation of energy


States energy can be converted from one form to another but can be neither created nor destroyed

400

Endothermic

Absorption of heat, takes in energy from its surroundings

400

Thermochemistry

The study of heat changes that accompany chemical reactions and phase changes

400
deltaH is positive

Endothermic reaction

400

Is the enthalpy change for the complete burning of one mole of the subtance.


Enthalpy(heat) of Combustion (deltaHcomb)

500

Chemical Potential Energy

Energy that is stored in chemical bonds

500

If the products have less energy than the reactants, energy released

The reaction is exothermic

500

System

The part of the universe that contains the reaction you want to study

500

surroundings

Everything else in the universe

500

DeltaHsolid, the heat lost when a liquid changes to a solid at a constant temperature

Heat of condensation

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