Question

E2C.7(a) From the data in Table 20.4 of the Resource section, calculate ArH and Aruo at (i) 298 K, (ii) 478 K for the reaction C(graphite) + H2O(g) → CO(g) + H2(g). Assume all heat capacities to be constant over the temperature range of interest.

Answer 1

calulation tal of 04 and ou at 298 K. Cegraphite) + H₂O(g) og + H2 lgs. A = (og theo & A M ) - ( sf the) + Of Memos] of Hem) = 0 and of the grapunte) = 0 DH = of necos - Dino Aho) =-110.58 kJ/ und Dhen, o) = -241.82 kJlud & Dr H = (-110.53 + 241.82) Kslund 131.29 Kilud . H = all & DCPU) - Dru & DART) orlu - AH - Alng RT) = 131.29 - 1x 0.0821 x 298 = 106.82 K I hud (ang=t) calulation of DH and se Do Dr H & AT (ANH)298 AT (Ord IT at 4781 (Arlancp, AT) 0.4298 - AT, (Dr)418 AT Art 428 - ST2 x D x H) 298 ; (Drd) 478 AT 2 (Dr U) 98 BT, = 478 & 131.29 298 210.59 KJ sud = 478 x 106.82 298 = 141. 34 kJ/ued.