Delta H, Delta S, G, W

Quiz
•
Chemistry
•
11th - 12th Grade
•
Hard
Standards-aligned
Charles Martinez
FREE Resource
21 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which reaction has the greatest decrease in entropy?
2H2 (g) +O2(g) => 2H2O(l)
H2O(g) => H2O(l)
2H2 (g) +O2(g) => 2H2O(g)
H2O(g) => H2O(s)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For which of these processes is the value of ΔH expected to be negative?
1. The temperature increases when calcium chloride dissolves in water.
2. Steam condenses to liquid water
3. Water boils
4. Dry ice sublimates
1 and 2 only
3 and 4 only
2 and 3 only
1 only
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What factors determine the spontaneity of a reaction?
enthalpy only
entropy only
enthalpy and entropy
enthalpy, entropy and temperature
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When liquid condenses, what are the signs for Δ H and Δ S ?
Δ H = + Δ S = +
Δ H = - Δ S = -
Δ H = + Δ S = -
Δ H = - Δ S = +
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What signs of Δ H and Δ S will always yield a reaction that is non-spontaneous ? (Think of the equation for ΔG°!!)
Δ H = + Δ S = +
Δ H = - Δ S = -
Δ H = - Δ S = +
Δ H = + Δ S = -
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Predict the signs of Δ H , Δ S and Δ G for the reaction:
Mg(s) → Mg(g)
Δ H= - , Δ S = + and Δ G = - (all temps)
Δ H= + , Δ S = + and Δ G = - (At all temps)
Δ H= + , Δ S = + and Δ G = - (At low temps)
Δ H= + , Δ S = + and Δ G = - (At high temps)
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Calculate ΔH° for the combustion of methane.
CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g)
Given the enthalpies of formation below.
CH4 (g): -50.8 kJ/mol
O2 (g): 0 kJ/mol
CO2 (g): -394.4 kJ/mol
H2O (g): -228.57 kJ/mol
-801kJ/mol
+801kJ/mol
+572kJ/mol
-572kJ/mol
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
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