4A: Balancing Combustion Reactions
Chapter 4
University of Arkansas at Little Rock
Dr. Robert Belford




Question 1
Balance the equation for the combustion of propane C3H8
(A)  C3H8+O2-->CO2+ H2O
(B)  C3H8+5O2-->3CO2+4 H2O
(C)  CO2+ H2O-->C3H8+O2
(D)  2C3H8+8O2-->6CO2+ 5H2O
 
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Question 2
Balance the equation for the combustion of butane C4H10
(A)  C4H10+O2-->CO2+ H2O
(B)  C4H10+6.5O2-->4CO2+5 H2O
(C)  C4H10+7O2-->5CO2+ 8H2O
(D)  2C4H10+13O2-->8CO2+10 H2O
 
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Question 3
Balance the equation for the combustion of hydrogen.
(A)  H2+O2-->H2O
(B)  H2+O->H2O
(C)  2H2+O2-->2H2O
(D)  There is no carbon so this does not combust
 

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Question 4
Balance the equation for the combustion of magnesium.
(A)  Mg + O -->MgO
(B)  Mg + O2-->MgO2
(C)  2Mg +O2-->2MgO
(D)  Magnesium will not combust
 

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Question 5
Balance the equation for the combustion of ethanol (CH3CH2OH - drinking alcohol).
(A)  CH3CH2OH +3 O2-->2CO2 +3 H2O
(B)  2CH3CH2OH + 13O2-->4CO2 + 6H2O
(C)  CH3CH2OH + O2-->CO2 + H2O
(D)  3CH3CH2OH + 9O2-->6CO2 +12 H2O
 
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Question 6
Balance the equation for the combustion of isopropyl alcohol - (CH3)2CHOH - rubbing alcohol.
(A)  (CH3)2CHOH +O2-->2CO2 +3 H2O
(B)  2(CH3)2CHOH +9O2-->6CO2 +8 H2O
(C)  (CH3)2CHOH +O2-->2CO2 +3 H2O
(D)  (CH3)2CHOH +4.5O2-->3CO2 +2 H2O
 
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