Posted by Anonymous on Thursday, April 8, 2010 at 3:26pm.
I believe you need to do the following:
reverse equation 1 and change sign of delta H.
Multiply equation 2 x 2 and reverse. Multiply delta H by 2 and change sign.
Multiply equation 3 by 4. Multiply delta H by 4.
Add the equations and add the delta Hs.
When you finish you should have
2N2 + 5O2 ==> 2N2O5 which is just twice what you are looking for so divide the coefficients by 2 throughout and divide total delta H by 2.
Related Questions
CHEM-HELP!!!! - help? how do i calculate the heat of formation of a solid? i ...
chemistry - At what temperature would you expect dinitrogen pentoxide to sublime...
Chem - Does my work here look right? 3. One mole of an ideal gas expands ...
Chemistry - Consider the following two thermochemical equations N2+2.5O2->...
Chemistry - Consider the following two thermochemical equations N2+2.5O2->...
P-Chem - The equilibrium constant K for the hydrolysis of adenosine triphosphate...
chem - calculate the change in enthalpy when 1.00g of hydrogen peroxide ...
Chemistry - The standard enthalpies of formation of ions in aqueous solutions ...
Chemistry- college - The standard enthalpies of formation of ions in aqueous ...
Chemistry - Give the enthalpy change and entropy change values shown below ...
For Further Reading
