Examine the following reactions.Reaction 1PCl3(g) + Cl2(g) →→ PCl5(g)Reaction 2PCl5(g) →→ PCl3(g) + Cl2(g)Which options correctly explain the relationship between the two reactions?Select all that apply.Both reactions contain entirely gaseous substances, making them both decomposition reactions.Both reactions contain all the same substances, making them both synthesis reactions.Reaction 1 is the opposite of Reaction 2.The reactant in Reaction 2 breaks apart, making it a decomposition reaction.The reactants in Reaction 1 combine instead of breaking apart, making it a synthesis reaction.Reaction 1 is the same as Reaction 2.

Question
Asked Dec 3, 2019
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Examine the following reactions.

Reaction 1
PCl3(g) + Cl2(g) →→ PCl5(g)

Reaction 2
PCl5(g) →→ PCl3(g) + Cl2(g)

Which options correctly explain the relationship between the two reactions?

Select all that apply.

Both reactions contain entirely gaseous substances, making them both decomposition reactions.
Both reactions contain all the same substances, making them both synthesis reactions.
Reaction 1 is the opposite of Reaction 2.
The reactant in Reaction 2 breaks apart, making it a decomposition reaction.
The reactants in Reaction 1 combine instead of breaking apart, making it a synthesis reaction.
Reaction 1 is the same as Reaction 2.
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Expert Answer

Step 1

The reaction 1 is written as follows:

PCl3 (g) + Cl2 (g) → PCl5 (g)

The reaction 2 is written as follows:

PCl5 (g) →PCl3 (g) + Cl2 (g)

The statements that do not apply are written below.

Reaction 1 is not a decomposition reaction as it leads to the formation of PCl5. Thus, the statement “ Both reactions contain entirely gaseous substances, making them both decomposition reactions” is incorrect.

Reaction 2 is a decomposition re...

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