L23 - Thermodynamics

The different forms of heat and means to determine the heat of any chemical reactions

Change in Energy

The change in energy is equal to the energy of the products minus the energy of the reactants.

Enthalpy Change

Heat flow at constant pressure.

Phase Transition

A transition from a solid state to a liquid state or a gaseous state to a solid state; changing the state of matter.

Latent Heat

The amount of energy that you have to put in to have your phase transition; heat flow that doesn't change the temperature, It's just changing the phase at a constant temperature.

Intermolecular Interactions

Forces between different molecules that all have something to do with the distribution of electrons in those two molecules.

Vaporization

Going from a liquid state to a gaseous state.

Condensation

Going from the gas to the liquid.

Fusion

Melting; going from a solid to a liquid.

Solidification

Solidification or freezing; going from a liquid to a solid.

Sublimation

A direct transformation from a solid to a gas.

Delta H Knot

Enthalpy change at standard pressure, normal atmospheric pressure for one mole of the substance.

Hess's Law

The enthalpy change going from one state to another state doesn't depend on the path that we take.

Formation reaction

Enthalpy changes require a different amount of energy to form a substance from its elements at standard conditions.