part c

4 [41 ICHO PP6] Hydrogen gas may be prepared industrially by heating hydrocarbons, such as a methane, with steam: A 3H2 (g) + CO (9) CH4 (g) + H2O (9) a) Given the following thermodynamic data, calculate the 4 G for reaction A at 298 K and hence a value for the equilibrium constant, Kp. A/H (298)/kJ molt S (298)/J K molt -74.4 186.3 CHA (9) H2O (9) -241.8 188.8 H2 (9) 130.7 CO (9) -110.5 197.7 b) How will the equilibrium constant vary with temperature? The industrial preparation can be carried out at atmospheric pressure and high temperature, without a catalyst. Typically, 0.2 vol % of methane gas remains in the mixture at equilibrium. c) Assuming the reaction started with equal volumes of methane and steam. calculate the value of Kp for the industrial process which gives 0.2 vol % methane at equilibrium. d) Use your answer from (c) together with the integrated form of the van't Hoff isochore to estimate the temperature used in industry for the preparation of hydrogen from methane