Lecture on Key Concepts in Chemistry

These flashcards cover essential vocabulary and definitions related to chemical reactions, their characteristics, and important principles.

Chemical Reaction

A process that leads to the transformation of one set of chemical substances to another.

Reactants

The starting substances in a chemical reaction.

Products

The substances that are produced in a chemical reaction.

Catalyst

A substance that increases the rate of a chemical reaction without undergoing permanent change itself.

Exothermic Reaction

A reaction that releases energy in the form of heat or light.

Endothermic Reaction

A reaction that absorbs energy from its surroundings.

Activation Energy

The minimum energy required to initiate a chemical reaction.

Equilibrium

The state in which the concentrations of reactants and products remain constant over time.

Le Chatelier's Principle

If an external change is applied to a system at equilibrium, the system adjusts to counteract that change.

Stoichiometry

The calculation of reactants and products in chemical reactions.