Bulk Properties of Water

At room conditions, the density of liquid water is about
1. 1 g/mL
2. 18 g/ml
3. 22.4 g/mL
4. 0 g/mL
The boiling point of pure water at standard pressure is
1. 0°C
2. 32°C
3. 100°C
4. 212°C
The freezing point of pure water at standard pressure is
1. 0°C
2. 32°C
3. 100°C
4. 212°C
Which of these phase changes occurs by the removal of energy?
1. boiling
2. condensation
3. freezing
4. melting
Which of these phase changes occurs by the absorption of energy?
1. boiling
2. condensation
3. freezing
4. melting
Separate 100 gram masses of iron and liquid water are each allowed to absorb 600 joules of energy. As a result,
1. the temperature of the water changes more than the temperature of the iron
2. the temperature of the iron changes more than the temperature of the water
3. the temperatures of both change by the same amount
4. neither the water nor the iron experience a temperature change
The temperature would be expected to remain constant during which of the following phase changes?
1. boiling
2. condensation
3. freezing
4. melting
Use this information to answer the question below:
ΔH_fus (H₂O) = 334 J/g
ΔH_vap (H₂O) = 2260 J/g

How much energy is required to boil 50 grams of water at its boiling point?
1. 100 J
2. 113 000 J
3. 45.2 J
4. 50 J
Use this information to answer the question below:
ΔH_fus (H₂O) = 334 J/g
ΔH_vap (H₂O) = 2260 J/g

How much energy is required to melt 50 grams of ice at its melting point?
1. 16 700 J
2. 113 000 J
3. 6.68 J
4. 50 J
Which of these has the greatest density, assuming standard pressure?
1. Liquid water at 4°C
2. Liquid water at 95°C
3. Ice at -10°C
4. Steam at 120°C
Refer to the image below when answering this question. Assume standard pressure.

As energy is added and one moves from point #5 to point #6, the change taking place is
1. an increase in the temperature of liquid water
2. an increase in the density of water
3. liquid water is becoming steam
4. ice is melting
Refer to the image below when answering this question. Assume standard pressure.

As energy is added and one moves from point #5 to point #6, the temperature
1. remains constant
2. increases
3. decreases
Refer to the image below when answering this question. Assume standard pressure.

The temperature at point #6 is
1. 100°C
2. 32°C
3. 0°C
4. 100°F
Refer to the image below when answering this question. Assume standard pressure.

At point #2, water would be found as
1. a liquid only
2. a solid only
3. a solid and a liquid
4. a liquid and a vapor
5. a vapor only
Refer to the image below when answering this question. Assume standard pressure.

As energy is being removed (going right to left), the phase change occuring at point #2 would be
1. freezing
2. boiling
3. condensation
4. melting
Refer to the image below when answering this question. Assume standard pressure.

The temperature at point #1 is
1. below 0°C
2. 0°C
3. Between 0°C and 100°C
4. above 100°C
Refer to the image below when answering this question. Assume standard pressure.

The density of water is highest at point
1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
Refer to the image below when answering this question. Assume standard pressure.

The measure of the energy required to move from point #3 to point #4 on the graph is determined by the
1. specific heat of liquid water
2. specific heat of steam
3. specific heat of ice
4. heat of fusion of water
5. heat of vaporization of water
Refer to the image below when answering this question. Assume standard pressure.

Which forms of water would be present at point #7?
1. liquid only
2. steam only
3. ice only
4. liquid and steam
5. solid and liquid
Refer to the image below when answering this question. Assume standard pressure.

The difference in temperature between point #2 and point #6 is
1. 100°C
2. 273°C
3. 32°F
4. 212°F
Refer to the image below when answering this question. Assume standard pressure.

Features of this graph support which observations about water?
1. The specific heat of liquid water is greater than that of steam or ice.
2. The heat of vaporization of water is greater than the heat of fusion.
3. Temperature remains constant during a phase change.
4. Water freezes at 0°C and boils at 100°C.
5. Water is denser as a liquid than it is as a solid.
Which of these is NOT a characteristic of most pure substances, but is true of water?
1. Expands when it freezes
2. Heat of vaporization is greater than the heat of fusion
3. Boiling point is greater than the melting point
4. Temperature remains constant during a phase change