Chem Vocab: Delocalization to Exothermic

Question 1

delocalization

Answer 1

Delocalization is when electrons become free to move all over a molecule, such as when double bonds occur on adjacent atoms in a molecule.

Question 2

denature

Answer 2

There are two common meanings for this in chemistry. First, it can refer to any process used to make ethanol unfit for consumption (denatured alcohol). Second, denaturing can mean breaking down the three-dimensional structure of a molecule, such as a protein that is denatured when exposed to heat.

Question 3

diffusion

Answer 3

Diffusion is the movement of particles from an area of higher concentration to one of lower concentration.

Question 4

dilution

Answer 4

Dilution is when a solvent is added to a solution, making it less concentrated.

Question 5

dissociation

Answer 5

Dissociation is when a chemical reaction breaks a compound into two or more parts. For example, NaCl dissociates into Na+ and Cl- in water.

Question 6

double displacement reaction

Answer 6

A double displacement or double replacement reaction is when cations of two compounds switch places.

Question 7

effusion

Answer 7

Effusion is when a gas moves through an opening into a low-pressure container (e.g., is drawn by a vacuum). Effusion occurs more quickly than diffusion because additional molecules aren’t in the way.

Question 8

electrolysis

Answer 8

Electrolysis is using electricity to break the bonds in a compound to break it apart.

Question 9

electrolyte

Answer 9

An electrolyte is an ionic compound that dissolves in water to produce ions, which can conduct electricity. Strong electrolytes completely dissociate in water, while weak electrolytes only partially dissociate or break apart in water.

Question 10

enantiomers

Answer 10

Enantiomers are molecules that are non-superimposable mirror images of each other.

Question 11

endothermic

Answer 11

Endothermic describes a process that absorbs heat. Endothermic reactions feel cold.

Question 12

endpoint

Answer 12

The endpoint is when titration is stopped, typically because an indicator has changed color. The endpoint need not be the same as the equivalence point of a titration.

Question 13

energy level

Answer 13

An energy level is a possible value of energy that an electron can have in an atom.

Question 14

enthalpy

Answer 14

Enthalpy is the amount of energy in a system.

Question 15

entropy

Answer 15

Entropy is the disorder or randomness in a system.

Question 16

enzyme

Answer 16

An enzyme is a protein that acts as a catalyst in a biochemical reaction.