Chapter 10 - Water as a Unique Chemical

Question 1

Density

Answer 1

The mass of a substance per unit of volume, denoted by the letter ‘d’.

Question 2

Hydride

Answer 2

A compound containing hydrogen, such as water.

Question 3

Latent Heat

Answer 3

The energy (measured in kJ/mol) required to change the state of a substance at its melting or boiling point.

Question 4

Latent Heat of Fusion

Answer 4

The energy required to change 1 mol of a substance at its melting point from a solid to a liquid (6.0 kj/mol for water).

Question 5

Latent Heat of Vaporisation

Answer 5

The energy required to change 1 mol of a substance at its boiling point from a liquid to a gas (40.7 kJ/mol for water).

Question 6

Specific Heat Capacity

Answer 6

The amount of energy (measured in J/kg°C) to heat 1 gram of a substance by 1°C.

Question 7

Energy Required to Heat a Mass of Substance

Answer 7

q = mc∆T (note: ‘q’ is in J and ‘m’ is in g)

Question 8

Energy Required for a Change of State Formula

Answer 8

q = nL (note: q in is kJ)

Question 9

Density Formula

Answer 9

d = m / V