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Chapter 4: Q.64. (page 128)

Question: Draw the products of combustion of each alkane.

a.

b.

Short Answer

Expert verified

Answer

a.7CO2and8H2Ob.4CO2and5H2O

Step by step solution

01

Combustion reaction

In a combustion reaction, a substance burns in the presence of oxygen (excess of air) to give carbon dioxide gas and water as the only reaction products.

The products of combustion reactions always remain the same irrespective of the reactant materials. The initial substance undergoing the combustion reaction is generally called a fuel.

02

Combustion of alkanes

Combustion requires a flame or spark for the initiation of the reaction.

When alkanes undergo combustion, all of their C-H bonds and C-C bonds break to form new C-O bonds.

03

Combustion reactions of the given alkanes

a. The given compound 2-methylhexane reacts with the oxygen in the air to give seven moles of carbon dioxide gas and eight moles of water.


CH3-CH2-CH2-CH2-CHCH32+11O2鈫�Flame7CO2+8H2O2-methylhexane


b. The given compound butane undergoes combustion to form four moles of carbon dioxide gas and five moles of water.


CH3-CH2-CH2-CH3+132O2鈫�Flame4CO2+5H2O

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Most popular questions from this chapter

Question: Haloethanes(CH3CH2X,X=Cl,Br,I) have similar barriers to rotation (13.4鈥�15.5 kJ/mol) despite the fact that the size of the halogen increases, role="math" localid="1648639622891" Cl鈫�Br鈫�I. Offer an explanation.

Question: Classify each transformation as an oxidation, reduction, or neither.

a.

b.

c.

d.

Question: When two six-membered rings share a C-C bond, this bicyclic system is called decalin. There are two possible arrangements: trans-decalin having two hydrogen atoms at the ring fusion on opposite sides of the rings, and cis-decalin having the two hydrogens at the ring fusion on the same side.

  1. Draw trans- and cis-decalin using the chair form for the cyclohexane rings.
  2. The trans isomer is more stable. Explain why.

Give the structure corresponding to each IUPAC name.

a. 1,2-dimethylcyclobutane

b. 1,1,2-trimethylcyclopropane

c. 4-ethyl-1,2-dimethylcyclohexane

d. 1-sec-butyl-3-isopropylcyclopentane

e. 1,1,2,3,4-pentamethylcycloheptane

Question: Classify the ring carbons as up C鈥檚 or down C鈥檚. Identify the bonds highlighted in bold as axial or equatorial.
See all solutions

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