Chapter 5, Problem 74E

Consider the following balanced equation in which gasX forms gas ${\text{X}}_{\text{2}}$ :

$\text{2X(}g\text{)}\to {\text{X}}_{\text{2}}\text{(}g\text{)}$

Equal moles of X are placed in two separate containers.One container is rigid, so the volume cannot change; theother container is flexible, so the volume changes tokeep the internal pressure equal to the external pressure.The above reaction is run in each container. What happensto the pressure and density of the gas inside eachcontainer as reactants are converted to products?