Enthalpy/Entropy/Hess's Law
Quiz
•
Chemistry
•
10th Grade
•
Hard
Standards-aligned
Alexandra Lawson
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hess' Law makes use of which principle to calculate the enthalpy change of a reaction?
The law of conservation of energy
The law of conservation of matter
The law that you will always find a lost item in the last place you look for it
Murphy's law
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The following equations show the oxidation of carbon and carbon monoxide to carbon dioxide.
C(s) +O2(g) → CO2(g) ΔH = –x kJ mol–1
CO(g) + O2(g) → CO2(g) ΔH = –y kJ mol–1
What is the enthalpy change, in kJ mol–1, for the oxidation of carbon to carbon monoxide?
C(s) + O2(g) → CO(g)
x + y
-x - y
y - x
x - y
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Consider the following equations.
Mg(s) + O2(g) → MgO(s) ∆H = –602 kJ
H2(g) + O2(g) → H2O(g) ∆H = –242 kJ
What is the ∆H value (in kJ) for the following reaction?
MgO(s) + H2(g) → Mg(s) + H2O(g)
-844
-360
+360
+844
Tags
NGSS.HS-PS1-4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Using the equations below:
C(s) + O2(g) → CO2(g) ∆H = –390 kJ
Mn(s) + O2(g) → MnO2(s) ∆H = –520 kJ
what is ∆H (in kJ) for the following reaction?
MnO2(s) + C(s) → Mn(s) + CO2(g)
910
130
-130
-910
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is true of an endothermic reaction?
The substances in the reaction will release energy
The substances in the reaction will absorb energy
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
When substances change from solid, to liquid, to gas, entropy increases. Why?
The molecules become more randomly arranged and move more chaotically
The molecules spread out and take up more space
The molecules become more reactive
The molecules become more compact and organized
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
decrease
increase
remains the same
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