
7F CC Amnesty Day
Authored by Christina Hicks
Chemistry
10th Grade

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7 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Entropy increases from solid, liquid to gas. Why?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the reactions below has a negative ∆S?
CuCO3 (s) + 2HCl (aq) → CuCl2 (aq) + CO2 (g) + H2O (l)
C (s) + O2 (g) → CO2 (g)
CuO (s) + H2SO4 (aq) → CuSO4 (aq) + H2O (l)
BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following would most likely lead to a spontaneous reaction.
A high negative enthalpy.
A low negative enthalpy.
A high positive enthalpy.
A low positive enthalpy.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A reaction has a positive ΔH and a positive ΔS. Which of the following is true?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which combination of ΔH and ΔS NEVER has a spontaneous reaction?
+ΔH and +ΔS
+ΔH and -ΔS
-ΔH and -ΔS
-ΔH and +ΔS
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
6. The formation ½ A2 + 2 B2 + C --> CAB4 has an enthalpy of formation of -104 kJ and a change in entropy of -60.8 J/K at 30 °C. What is the free energy and spontaneity of the reaction?
-85.6 kJ, spontaneous
-18.3 kJ, not spontaneous
+18.3 kJ, spontaneous
+85.6 kJ, not spontaneous
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