Enthalpy Stoichiometry

Quiz
•
Science
•
12th Grade
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Calculate ΔH when 2 moles of ethanol (C2H5OH) reacts with excess oxygen according to the following thermochemical equation?
-2733.4 kJ
-683.35 kJ
-1366.7 kJ
-910.67 kJ
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The standard enthalpy changes of combustion of carbon, hydrogen and methane are shown in the table. Which one of the following expressions gives the correct value for the standard enthalpy change of formation of methane in kJ mol–1? C(s) + 2H2(g) → CH4(g)
394 + (2 × 286) – 891
–394 – (2 × 286) + 891
394 + 286 – 891
–394 – 286 + 891
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Given the following data: ΔH○f[FeO(s)] = –270kJmol–1
ΔH○f [Fe2O3(s)] = –820 kJ mol–1
S elect the expression which gives the enthalpy change, in kJ mol–1, for the reaction:
2FeO(s) + 1⁄2O2(g) → Fe2O3(s)
(–820 × 1⁄2) + 270 = –140
(+820 × 1⁄2) – 270 = +140
–820 + (270 × 2) = –280
+820 – (270 × 2) = +280
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ΔH is the same thing as:
temperature
q
m
C
Tags
NGSS.HS-PS3-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If ΔH is positive, heat would be shown on the _____ side of the thermochemical equation.
Reactant
Product
Tags
NGSS.HS-PS1-4
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
C+ O2 --> CO2 + 60kJ, what is the value for ΔH for the reaction?
+60
-60
there is no way to know
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What will ΔH be if there is 1 mole of oxygen? 4Fe(s) + 3O2(g) --> 2Fe2O3(s) ΔH = –1500 kJ
-500 kJ
500 kJ
-750 kJ
-4500 kJ
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
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