Suppose the first equation is reversed and muitiplied by i the second and third

Question

Suppose the first equation is reversed and muitiplied by i the second and third equation are divided by 2, and the three adjusted equations are added. What is the net reaction and what is the overall heat of this reaction? Answer 116. Given the following data Fe2O3(s) + 3C0(g) 2Fe(s) +3CO2(g) 3Fe2O3 (s) + CO(g) 2Fe,04 (s) + CO2 (g) Fe304 (s) + CO(g) 3Fe0(s) + CO2 (g) Ar--23 kJ H=-39 kJ Ar- 18 kJ calculate AH for the reaction FeO(s) + CO(g) Fe(s) + CO2 (g) 17. At 298 K, the standard enthalpies of formation for C2H2(g) hd Gir() are 227 k/mol and 49 k]/mol, respectively. a. Calculate AH" for CsHa (1) 3C2H2 (g) Answer

Explanation / Answer

lets try to write the given reaction in terms of reactions 1,2,3,4

required reaction can be written as

required reaction = - (1/3)reaction 3 + (1/2)reaction 1 - (1/6)*reaction 2

so,

delta H = -(1/3)*delta H3 + (1/2)*delta H1 -(1/6)*delta H2

= -(1/3)*18 + (1/2)*(-23) - (1/6)*(-39)

= -6 - 11.5 + 6.5

= -11 KJ

Answer: -11 KJ

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