4. Use the Clausius-Clapeyron equation to plot the equilibrium-line for graphite and diamond and indicate where each phase will fall. (Hint: once you calculate the slope, you will need to determine the y-intercept to plot the line.) Pressure units are Kbar and temperature units are K. 4. Use the Clausius-Clapeyron equation to plot the equilibrium-line for graphite and diamond and indicate where each phase will fall. (Hint: once you calculate the slope, you will need to determine the y-intercept to plot the line.) Pressure units are Kbar and temperature units are K