# chemistry

posted by .

4 FeO(s) + O2(g) ¨ 2 Fe2O3(s)

calculate value of delta H
i have done this
4(-272.0)+0->2(-825.5)
and the products minus reactants and i got -563 but it is not right?!

• chemistry -

My table says Fe2O3(s) = -824.2 kJ/mol which gives -560.4 kJ for the reaction.

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### Chem

First off, thanks for the help on the other problems... For the reaction, A(g) + 2 B(g) <==> 2 C(g), Kc = 1 x 10-10 at 25°C. Which of the following statements is true?
2. ### chem!

Calculate the heat of reaction for the incomplete combustion of 67.0g propane producing carbon monoxide gas and water vapour. how would I go about and do this question?
3. ### Chemistry

At 1100 K, Kp=0.25 for the following reaction. 2SO2(g) + O2(g) (reversible arrows) 2SO3(g) What is the value of K at this temperature?
4. ### chemistry

Given: *Fe2O3(s)+3CO(s)-->2Fe(s)+3CO2(g)(delta h is -23kJ) *3Fe2O3(s)+CO(g)-->2Fe3O4(s)+CO2(g)(delta h is -39kJ) *Fe3O4(s)+CO(g)-->3FeO(s)+CO2 (delta h is 18kJ) Desired:FeO(s)+CO(g)-->Fe(s)+CO2(g) find delta h for the desired …
5. ### biology

To find the equilibrium constant a. one should take the log10 of the concentration of products over the concentration of reactants none of the above b. none of the answers is correct c. one should measure the concentrations of products …
6. ### Chemistry(Please check answers)

1) The standard molar entropy value of N2 (g) is 191.5 J/K-mol, of O2 (g) is 205.0 J/K-mol and of NO2 (g) is 240.0 J/K-mol. From these values we can calculate the Delta So for the reaction N2 (g) + 2 O2 (g)-> 2 NO2 (g) to be?
7. ### AP Chemistry

So I have the reaction 2HBr(g) <--> H2(g)+Br2(g) I'm supposed to find the equilibrium constant, K, using free energy (G) values. The values in my textbook for G of H2 and Br2 were zero, and the value for HBr(g) was -53.5. So, …
8. ### chemistry

The problem si 209/83bi+64/28NI=272/111Rg+1/0n How to calculate the energy change in J/mol reactants?
9. ### Chemistry 2

For the gaseous reaction of carbon monoxide and chlorine to form phosgene, (COCl2), calculate each of the following. (a) Calculate S° at 298 K I got -136.76 J/K using delta S = sum of delta S of products minus sum of delta S of reactants …
10. ### chemistry

Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 2. (ΔH°f (HgO(s)) = -90.7 kJ/mol and ΔH°f (FeO(s)) = -272 kJ/mol.) (a) 2 Fe(s) + O2(g) 2 FeO(s) …

More Similar Questions