For the gas phase reaction ${\text{PCl}}_5(g)\rightleftharpoons {\text{PCl}}_3(g)+{\text{Cl}}_2(g)$, which of the following conditions is correct?

1. The dissociation of ${\text{PCl}}_5$ is an endothermic process because energy is required to break the bonds. So, $\Delta H>0$.2. In the reaction, $1\text{mole of gas}$ produces $2\text{moles of gas}$. This increase in the number of gaseous molecules leads to an increase in randomness. So, $\Delta S>0$.