Chemistry and Energy Concepts

Practice vocabulary flashcards covering chemical reactions, energy, solutions, pH scale, and atomic structure based on the lecture notes.

Exergonic reactions

Chemical reactions that release free energy.

Undergonic reaction

Reactions that absorb free energy.

Activation energy

Energy needed by most chemical reactions to get started.

Catalyst

Substance that reduces the amount of activation energy needed for a reaction.

Enzyme

Substance that causes a reaction to speed up.

Solution

A mixture in which one or more substances are uniformly distributed in another substance.

Solute

The substance being dissolved.

Solvent

Substance in which the solute is dissolved.

PHscale

The scale comparing the relative concentration of hydronium thydroxide ions in solution.

Atomic number

Number of proton in an atom.

Compound

Pure substance made up of atoms of two or more elements.

Covalant bonds

Bonds that create molecules.

Molecules

Central core of an atom.

Onic bond

Chemical bond in which electrons are transformed.

Ian

Atom with a charge.

Energy

The ability to do work.

Free energy

What energy is called in a living system.

Reactants

Substances on the left side of the equation in a chemical reaction.

Products

Substances on the Brightside of the equation in a chemical reaction.