Chapter 3

Question 1

Specific heat

Answer 1

Amount of heat that must be absorbed or lost for 1g of a substance to change its temperature

Question 2

Heat of vaporization

Answer 2

Quantity of heat of a liquid must absorb for 1g of it to be converted from liquid to gas

Question 3

Evaporative cooling

Answer 3

The surface becomes cooler during evaporation because only molecules with the lowest kinetic energy are liquid

Question 4

Solution

Answer 4

A liquid that is in a homogenous mixture of 2 or more substances

Question 5

Solvent

Answer 5

The dissolving agent of a solution (water)

Question 6

Solute

Answer 6

Substance that is dissolved

Question 7

Aqueous solution

Answer 7

Solution with water as a solvent

Question 8

Hydrophillic

Answer 8

Having an affinity for water

Question 9

Hydrophobic

Answer 9

Having no affinity for water

Question 10

Molecular mass (molecular weight)

Answer 10

The sum of the mass of all the atoms in a molecule

Question 11

Mole

Answer 11

Number of grams of a substance that equals its molecular/atomic mass in daltons

Question 12

Molarity

Answer 12

A measure of solutes concentration referring to number of moles of solutes per liter of solution

Question 13

Hydrogen ion

Answer 13

Aa single proton, has a charge of +1

Question 14

Hydroxide ion (OH-)

Answer 14

Water molecule that lost its protons

Question 15

Hydronium ion (H3O)

Answer 15

Water molecule that has an extra proton

Question 16

Acids

Answer 16

Substance that increases the hydrogen ions concentration of a solution

Question 17

Base

Answer 17

A substance that reduces hydrogen ion concentration of a solution

Question 18

Buffers

Answer 18

Solution that contains a weak acid and its corresponding base. Minimize change in pH