One reaction involved in the conversion of iron ore to the metal is FeO(s) + CO(g) → Fe(s) + CO2(g) Use Hess’s Law to calculate ΔHrxn given the following. 3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g) ΔH = −47.0 k Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g) ΔH = −25.0 k Fe3O4(s) + CO(g) → 3 FeO(s) + CO2(g) ΔH = 19.0 k

Explanation:

Given that:

From equation (3) , multiplying (-1) with equation (3) and interchanging reactant with the product side; we have:

Multiplying  (2) with equation (4) ; we have:

From equation (1) ; multiplying (-1) with equation (1); we have:

From equation (2); multiplying (3) with equation (2); we have:

Now; Adding up equation (5), (6) & (7) ; we get:

   (According to Hess Law)

i think it's c. i'm not sure but i think so.

a electronegativity decreases beacuse the size of nucleus is bigger.