Ch 2: Chemistry of Life pt. 2

Enzymes

________: catalysts for chemical reactions in living things.

Equilibrium

________ is reached when both the reactants and products are made at the same rate.

chemical reaction

A catalyst will increase the speed of a(n) ________ as it gives it a "push.

Reactants

________: The substances that changed during a chemical reaction.

Substrates

________: The only reactants that a certain enzyme will act on.

Catalyst

________: a substance that decreases the activation energy needed to start a chemical reaction.

Chemical equilibrium

________: When a reaction takes place at an equal rate in both directions.

Chemical equations

________ show what happens during a reaction.

Energy

________ that is released is given off as heat or light.

chemical bonds

If energy is added to reactants, ________ are broken.

Enzymes

________ will bring the substrates together and act as a catalyst so the product can be formed easier.

chemical reactions

All ________ have changes in energy.

Energy

________ that is absorbed can come from ________ sources like the sun.

Chemical reactions

reactions that change substances into substances by breaking and forming chemical bonds

Reactants

The substances that changed during a chemical reaction

Products

The substances made by a chemical reaction

Bond energy

the amount of energy that will break a bond between two atoms

Chemical equilibrium

When a reaction takes place at an equal rate in both directions

Activation energy

the amount of energy that needs to be absorbed for a chemical reaction to start

Exothermic chemical reaction

Reaction that releases more energy than it absorbs

Endothermic chemical reaction

Reaction that absorbs more energy than it releases

Catalyst

a substance that decreases the activation energy needed to start a chemical reaction

Enzymes

catalysts for chemical reactions in living things

Substrates

The only reactants that a certain enzyme will act on