page 05 10. The following graph shows the variation in ∆G with temperature (T ) for a reaction. ∆G (kJ mol−1) + 0 200 400 − T (K) Which of the following statements is true? A The reaction is never feasible B The reaction is always feasible C The reaction is feasible above 300 K D The reaction is feasible below 300 K 11. Iron(III) oxide can be reduced to iron using hydrogen. Fe2O3(s)  +  3H2(g)  ↓  2Fe(s)  +  3H2O(g) Substance ∆Hf° (kJ mol−1) Fe2O3(s) −822 H2(g) 0 Fe(s) 0 H2O(g) −242 The enthalpy change, ∆H °, in kJ mol−1, for the reduction of iron(III) oxide using hydrogen is A −580 B −96 C +96 D +580. [Turn over