Heating and Cooling Curve Form 1- 22-23

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1. At what time does the entire solid disappear? Or what time does the solid just turn completely into a liquid? *

a) 0 min

b) 41 min

c) 82 min

d) 123 min

e) 164 min

2. Which interval represents the phase change that occurs between a liquid and a GAS!

a) D - E

b) B - C

c) E - F

d) A - B

e) C - D

3. Which interval represents the liquid phase only?

a) A - B

b) E - F

c) C - D

d) D - E

e) B - C

4. Which of following intervals does the average kinetic energy remain constant yet the potential energy increases?

a) A - B

b) E - F

c) C - D

d) E - D

e) B - C

5. What is the boiling point of the substance?

a) 30°C

b) 90°C

c) 55°C

d) 100°C

e) None of the choices

6. What is the condensation point of the substance?

a) 30°C

b) 90°C

c) 55°C

d) 100°C

e) None of the choices

7. What is the correct equation that describes Interval B - C and is correctly described as either endothermic or endothermic?

a) H₂O (s) → H₂O (l) + Heat , Endothermic

b) H₂O (s) → H₂O (l) + Heat , Exothermic

c) H₂O (s) + Heat → H₂O (l) , Endothermic

d) H₂O (s) + Heat → H₂O (l) , Exothermic

e) H₂O (l) → H₂O (g) + Heat , Endothermic

f) H₂O (l) → H₂O (g) + Heat , Exothermic

g) H₂O (l) + Heat → H₂O (g) , Endothermic

h) H₂O (l) + Heat → H₂O (g) , Exothermic

8. Given the following heating Curve complete the grid below:

Choose all columns that apply to the row's question. There may be more than one correct answer.

A - B

B - C

C - D

D - E

E - F

Interval where ONLY a regular geometric structure exists

Interval where ONLY a substance that has no definite shape but a definite volume.

Interval where ONLY a substance has no definite shape and no definite volume.

Interval(s) that represent phase change(s)

Intervals(s) that the Kinetic Energy stays constant

Interval(s) where the Kinetic Energy is converted to Potential Energy

Interval with the largest potential energy

All intervals where the Kinetic Energy is increasing

All Intervals where the Potential Energy is increasing

All intervals where there is an endothermic phase change occurring

A - B

B - C

C - D

D - E

E - F

Interval where ONLY a regular geometric structure exists

Interval where ONLY a substance that has no definite shape but a definite volume.

Interval where ONLY a substance has no definite shape and no definite volume.

Interval(s) that represent phase change(s)

Intervals(s) that the Kinetic Energy stays constant

Interval(s) where the Kinetic Energy is converted to Potential Energy

Interval with the largest potential energy

All intervals where the Kinetic Energy is increasing

All Intervals where the Potential Energy is increasing

All intervals where there is an endothermic phase change occurring

9. True(T), False (F), Correct Explanation (CE). In the following statement please identify if each statement before and after the Because is True or False. *

Here is another example with an explanation:

False, False

Fasle, True

True, False

True, True

True, True, Correct Explanation.

10. Given the following data from a Cooling Curve Experiment where a hot liquid cooled and froze .

78°C

74°C

72°C

71°C

68°C

63°C

58°C

51°C

45°C

Based on this data, determine the freezing point.

Please just add the numbers with no units.

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