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by Alwel7041
Sun Jan 12, 2014 3:31 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Self-Test 7.12A
Replies: 2
Views: 437

Self-Test 7.12A

The thermochemical equation for the combustion of cyclohexane, C6H12 is: C6H12(l) + 9O2(g) --> 6CO2(g) + 6H2O(l) Enthalpy Change (H)=-3920kJ at 298K. What is the change in internal energy for the combustion of 1 mol C6H12(l) at 298K? I understand that the equation to convert between H and U is Chang...
by Alwel7041
Fri Jan 10, 2014 10:03 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 7.71 [ENDORSED]
Replies: 5
Views: 2199

7.71 [ENDORSED]

Calculate the Standard Enthalpy of Formation of Dinitrogen pentoxide from the following data and from the standard enthalpy of formation of nitric oxide: 2NO(g) + O2(g) --> 2NO2(g) H=-114.1kJ 4NO2(g) + O2(g) -->2N2O5(g) H= -110.2 kJ For this question, I do not understand how to figure out the "...

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