(07.07 MC) Consider the following equilibrium reaction having gaseous reactants and products.
4HCI + O2 = 2H2O + Cl2 AH=-120.2 KJ/mol
Which of the following is true of this reaction? (4 points)
O the reaction is endothermic
O the reaction is not favored
the entropy is increasing
O the entropy is decreasing

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explanation:

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.