Consider the following equilibrium:

$N_2{O}_4(g)2N{O}_2(g),G^0=5\mathrm{.}4kJ$

Now suppose a reaction vessel is filled with $1\mathrm{.}27$atm of nitrogen dioxide $(N{O}_2)$ at $463.C.$ Answer the following questions about this system:

$\backslash$table$[[$Under these conditions, will the pressure of $N{O}_2$ tend to rise or fall?,rise$],[$Is it possible to reverse this tendency by adding $N_2{O}_4?,],[$In other words, if you said the pressure of $N{O}_2$ will tend to rise, can that,$],[$be changed to a tendency to fall by adding $N_2{O}_4?$ Similarly, if you said,$],[$the pressure of $N{O}_2$ will tend to fall, can that be changed to a tendency to$,],[$rise by adding $N_2{O}_4?,],[\backslash$table$[[$If you said the tendency can be reversed in the second question, calculate$],[$the minimum pressure of $N_2{O}_4$ needed to reverse it$.]],],[$Round your answer to $2$ significant digits.,atm$]]$