Give the gradient of a graph of p against T in terms of n, R and V.

When the reaction 2h2s(g) 2h2(g) + s2(g) is carried out at 1065°c, kp = 0.012. starting with pure h2s at 1065°, what must the initial pressure of h2s be if the equilibrated mixture at this temperature is to contain 0.250 atm of h2(g)?