Chemistry Calculating delta H of reaction using bond energies?

AI Thread Summary
Calculating delta H of a reaction using bond energies can be challenging, especially when dealing with reactants in different states, such as a liquid and a molecule with resonance. Bond energy values typically apply to gases, complicating the application to liquids or resonance structures. It's essential to understand how to approximate or adapt these values for non-gaseous states. The discussion emphasizes the importance of making an attempt to solve the problem, even if the initial understanding is unclear. Seeking guidance and clarification on these concepts can help facilitate a better grasp of the calculations involved.
needhelpwithchem
Messages
2
Reaction score
0
Homework Statement
Please see picture
Relevant Equations
delta H = q
Hi, I have been stuck for hours, i do not understand how i am supposed to use bond energy values for this question like it asks when bond energy values are for molecules in the gas state. The first molecule reactant is a liquid and the second reactant has resonance. I have 0 idea how to approach this. Please help
 

Attachments

  • IMG_20200129_171731302.jpg
    IMG_20200129_171731302.jpg
    20.4 KB · Views: 307
Physics news on Phys.org
Better picture
 

Attachments

  • IMG_20200129_174446270.jpg
    IMG_20200129_174446270.jpg
    35.3 KB · Views: 336
PF is like the Peanuts strip where Snoopy is waiting to cross the street and the signal turns green, "You have to move your feet." Make some sort of attempt.
 
Thread 'Confusion regarding a chemical kinetics problem'
TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
Back
Top