For the Gas Phase reaction PCl5(g) ----- PCl3(g) + Cl2(g). Which of the following conditions are true? ​

Dear Student,

As the given reaction is the decomposition reaction of $PC{l}_{5}$ and normally all the decomposition reaction are endothermic which requires energy to break the bond. Hence enthalpy of reaction is positive .

In the given reaction 1 mol of ​$PC{l}_{5}$ gives the 2 mol of gaseous product. This suggests that there is the increases in the randomness or the entropy of reaction and hence can say that .

So, the correct condition is ΔH>0andΔS>0

Regards.

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