Which of the following is a valid reaction for combustion of an alcohol? Group of answer choices


Which of the following is a valid reaction for combustion of an alcohol?

Group of answer choices

2 C4 H7 O + 10.5 O2 – – – – > 8 CO2 + 7 H2O

2 C4 H7 O + 10 O2 – – – – > 8 CO2 + 7 H2O

2 C4 H7 O + 11 O2 – – – – > 8 CO2 + 7 H2O

2 C4 H7 O + 5 O2 – – – – > 8 CO2 + 7 H2O

Step 1 of 2

Given data:

2C4 H7 O+10.5O2⟶8CO2+7H2O

2C4 H7 O+10O2⟶8CO2+7H2O

2C4 H7 O+11O2⟶8CO2+7H2O

2C4 H7 O+5O2⟶8CO2+7H2O

Find: which of the above reaction is a valid reaction for combustion of an alcohol?

Explanation:

Alcohols completely combust in the presence of oxygen to form carbon dioxide and water.

Step 2 of 2

In a balanced reaction for a given element number of atoms in the reactant side must be equal to number of atoms of the same element in the product.

In C4H7O there 4 carbon atoms and 7 hydrogen atoms and the product therefore will have 4CO2 molecules and 3.5H2O molecules which give rise to 8+3.5=11.5 oxygen atoms.

But there is one oxygen in C4H7O. So oxygen atoms required additionally are 11.5−1=10.5.

But Oxygen molecule is diatomic.

So O2 required is 10.5/2 So the balanced reactions is

C4H7O +(10.5)/2O2⟶4CO2 +3.5H2O

multiplying the equation with 2 gives or

2C4H7O+10.5O2⟶8CO2 +7H2O

is the balanced reaction.

Explanation:

Hence, option A is the correct answer.

Final solution

Therefore,

2C4H7O+10.5O2⟶8CO2 +7H2O is a valid reaction for combustion of an alcohol.

 

 

 

 

 

 

 

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