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- 1. Multiple Choice
Entropy increases from solid, liquid to gas. Why?Molecular disorder increasesMolecular randomness decreasesMolecules are more energeticMolecules are more reactive - 2. Multiple Choice
Which represents a decrease in entropy?
sublimation of CO2
boiling water
condensation of steam on cold glass
NaCl dissolving in water
- 3. Multiple Choice
The entropy will usually increase when
a molecule is broken into two or more smaller molecules
a reaction occurs that results in an increase in the number of moles of gas
a solid changes to a liquid
all of these
- 4. Multiple Choice
Systems in nature tend to undergo changes toward
lower energy and less disorder
lower energy and more disorder
higher energy and less disorder
higher energy and more disorder
- 5. Multiple Choice
Which sample has the lowest entropy?
HINT - Look at the phase of each chemical....
1 mole of KNO3(l)
1 mole of KNO3(s)
1 mole of H2O(l)
1 mole of H2O(g)
- 6. Multiple ChoiceWhich phase of matter has the greatest motion and least orderly arrangement?solidliquidgas
- 7. Multiple Choice
Which phase change represents a decrease in entropy?
solid to liquid
gas to liquid
liquid to gas
solid to gas
- 8. Multiple ChoiceEntropy always increases whenenthalpy decreases.temperature decreases.temperature increases.volume increases.
- 9. Multiple Choice
Entropy is a measure of
accuracy
precision
the disorder of a system
the attraction of a nucleus for an electron
- 10. Multiple Choice
Given the change of phase:
CO2(g) —> CO2(s)
As CO2(g) changes to CO2(s), the entropy of the system
decreases
increases
remains the same
- 11. Multiple Choice
Entropy of a system increases when a reaction increases the number of particles.
True
False
- 12. Multiple Choice
Which represents a decrease in entropy?
sublimation of CO2
boiling water
condensation of steam on cold glass
NaCl dissolving in water
- 13. Multiple Choice
What is a spontaneous process ?
slow process
fast process
process that needs an external intervention to occur
process that does not need external intervention to occur / keep happening
- 14. Multiple ChoiceEntropy is a measure of:orderdisorder
- 15. Multiple Choice
What is the symbol for entropy?
H
G
S
E
- 16. Multiple Choice
Entropy is a measure of
accuracy
precision
the disorder of a system
the attraction of a nucleus for an electron
- 17. Multiple Choice
Which of these reactions shows a DECREASE in entropy?
CaCO3(s) → CaO(s) + CO2(g)
3O2(g) → 2O3(g)
2NH3(g) → 3H2(g) + N2(g)
C6H6(l) → C6H6(g)
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