1. The combination of coke and steam produces a mixture called coal gas, which can be used as a fuel or as a starting material for other reactions. If we assume coke can be represented by graphite, the equation for the production of coal gas is[i4] 2C(s) + 2H,0(9) - CH,(9) + CO,(g) Determine the standard enthalpy change for this reaction from the following standard enthalpies of reaction : (1) C(s) + HO(g) - CO (g) + Hz (g) AH = 131.3kJ (2) CO (g) + H20(g) - COz (g) + Hz (g) AH = - 41.2 kJ (3) CH,(9) + HO(g) - 3H, (9) + CO (g) AH = 206.1kJ\fSpecific Heat Capacities of Substances Substance Specific heat capacity, c ice 2.01 J/(g."C) water 4.18 J/(g-C) steam 2.01 J/(g."C) aluminum 0.900 J/(g."C) iron 0.444 J/(g-C) methanol 2.918 J/(g."C)