Question

Part A How much heat (in kilojoules) is evolved or absorbed in the reaction of 3.40 g of Fe2O3 with enough carbon monoxide to produce iron metal? Fe, 3 (s) + 3CO(g) + 2Fe(s) + 3C02(9) AH° = -24.8kJ. ΑΣΦ 9 = q= | kJ Submit Request Answer Part B Is the process exothermic or endothermic? The process is exothermic. The process is endothermic.

Answer 1

Part A

Enthalpy change of the reaction when 1 mole Fe₂O₃ reacted $\Delta H$ = - 24.8 KJ.

So, heat is released in the reaction by 1 mole Fe₂O₃ = 24.8 KJ

Moles of Fe₂O₃ = (mass/molar mass) = (3.40/160)

= 0.02125

Heat is released by 0.02125 mole Fe₂O₃ when reacts with excess CO

= ( 24.8 × 0.02125 )

= 0.527 KJ.

= 5.3×10^-1 KJ. ( 2 significant digit).

Part B

In the above process heat is released, enthalpy change is negative. Hence the process is exothermic.

Exo means released.