AP Chemistry Unit 9
Authored by Cynthia Hofferth
Chemistry
11th - 12th Grade
NGSS covered
Used 116+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Entropy is always ________ in the Universe
increasing
decreasing
constant
Tags
NGSS.HS-PS3-4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which has the HIGHEST entropy change?
1 --> 2 particles
gas --> liquid
solid --> gas
low to high temperature (same phase)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which has a negative sign for S?
water evaporating
NaCl dissolving in water
water freezing
sublimation of CO2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which has a positive sign for S?
2Na (s) + Cl2 (g) --> 2NaCl (s)
H2O (g) --> H2O (l)
H+ (aq) + NO3- (aq) --> HNO3 (l)
CaCl2 (s) --> Ca2+ (aq) + 2Cl- (aq)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
reaction is ALWAYS spontaneous
- H, - S
+ H, + S
+ H, - S
- H, + S
Tags
NGSS.HS-PS1-4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
a reaction that is exothermic and has a decrease in entropy is
spontaneous at high temps
spontaneous at low temps
always spontaneous
never spontaneous
Tags
NGSS.HS-PS1-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
enthalpy is driving force when
exothermic
endothermic
increase in entropy
decrease in entropy
Tags
NGSS.HS-PS1-4
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