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Chemistry
9th -
12thgrade
Thermochemistry Basics, Entropy, Phase Diagrams
15 questions
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- 1. Multiple Choice
What is the definition of "entropy"??
enthalpy
heat content
disorder
activation energy
- 2. Multiple Choice
Which phase of matter has the least entropy?
solid
liquid
gas
plasma
- 3. Multiple Choice
What phase of matter has the most entropy?
solid
liquid
gas
- 4. Multiple Choice
Which involves an increase in entropy? (if needed, select more than one answer)
spraying an air freshener
picking up apples off the ground
dropping an egg on the floor
arranging a deck of cards by suit
- 5. Multiple Choice
Which involves a decrease in entropy? (if needed, select more than one answer)
condensation
melting
sublimation
freezing
- 6. Multiple Choice
At what temperature would the reaction of vinegar and baking soda occur the fastest?
0oC
50oC
75oC
120oC
- 7. Multiple Choice
Why does a thermometer display a high temperature with hot coffee?
the molecules are moving slowly & have many collisions with the thermometer
the molecules are moving slowly & have few collisions with the thermometer
the molecules are moving quickly & have many collisions with the thermometer
- 8. Multiple Choice
Which number represents condensation?
1
2
3
4
- 9. Multiple Choice
Which number represents melting?
1
2
3
4
- 10. Multiple Choice
Which represents the LIQUID phase?
A
B
C
- 11. Multiple Choice
Which number best represents the point where solid, liquid, & gas coexist in equilibrium?
1
2
3
4
- 12. Multiple Choice
The change in phase represented from point A to point B is...
boiling
melting
condensation
sublimation
- 13. Multiple Choice
The change in phase represented from point A to point B is...
melting
freezing
condensation
boiling
sublimation
- 14. Multiple Choice
The change in phase represented from point A to point B is...
condensation
boiling
sublimation
deposition
melting
- 15. Multiple Choice
From point M to point N at constant pressure, how many phase changes are occurring?
one phase change
two phase changes
three phase changes
no phase change occurs
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