WorksheetsEnergy, % Yield & Stoichiometry
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
The reaction:
A + B → C
ΔH = + 25 kJ
is a(n):
a)
Exothermic Reaction
b)
Endothermic Reaction
c)
Neutralization Reaction
d)
Spontaneous Reaction
2.
If 6.0 mol H2 reacts
with 1.5 mol N2
3H2 + N2 → 2 NH3
the limiting reagent is:
with 1.5 mol N2
3H2 + N2 → 2 NH3
the limiting reagent is:
a)
ammonia
b)
hydrogen
c)
nitrogen
d)
there is no limiting reagent
3.
Which is true for this enthalpy diagram?
a)
Exothermic Reaction
b)
Endothermic Reaction
c)
ΔH > 0 kJ
d)
Δ H = 0 kJ
4.
If a student calculates a theoretical yield of 5.0 g but only collects 3.0 g of product, the % yield of the reaction is:
a)
30 %
b)
20 %
c)
167 %
d)
60 %
5.
How much heat is absorbed if
4.0 mole A reacts?
A + 2B + 22.0 kJ → 3C
4.0 mole A reacts?
A + 2B + 22.0 kJ → 3C
a)
22.0 kJ
b)
44.0 kJ
c)
66.0 kJ
d)
88.0 kJ
6.
Which is true for the reaction:
Y → Z + heat
Y → Z + heat
a)
Endothermic, ΔH < 0 kJ
b)
Endothermic, ΔH > 0 kJ
c)
Exothermic, ΔH < 0 kJ
d)
Exothermic, ΔH > 0 kJ
7.
Which is true?
a)
A = ΔH
b)
B = activation energy
c)
A = activation energy
d)
ΔH < 0
8.
Which is true?
a)
C = ΔH
b)
Endothermic reaction
c)
ΔH > 0
d)
all are true
9.
The Equation for this reaction is:
a)
C + O2 + 393 kJ→ CO2
b)
C + O2 → CO2 + 393 kJ
c)
C + O2 + 393 kJ→ CO
d)
C + O2 + 110 kJ → CO
10.
2 NO + Cl2 → 2NOCl
When 3.0 mol Cl2 reacts with 1. 5 mol NO:
When 3.0 mol Cl2 reacts with 1. 5 mol NO:
a)
there is no limiting or excess reagent
b)
NO is limiting reagent
c)
Cl2 is limiting reagent
d)
NOCl is the limiting reagent
100 %
