# Sogeri high school

Hydrazine,N2H4 burns in oxygen...
A...what are their product?(in chemical equation).
B..How many bondes are broken?
C..How many new bonds are formed from the. product side...
D.Total energy required to break the bond?
E.Total energy realised when new bonds are formed?
F.the overal delta H

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1. Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

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posted by PsyDAG
2. I assume the products are NO2 and H2O
N2H4 + 3O2 ==> 2NO2 + 2H2O

I will get you started but I'm having trouble understanding why you can't count bond broken and bonds formed.
For bonds broken, look at N2H4. There are four N-H bonds broken plus a N-N bond broken to make 5.
Look up the N-H bond to see how much energy is need to break that bond, multiply by 4 and add in the N-N bond. Then look up the O-O bond and multiply that by 3. Add that to the N2H2 bonds. That gives you the total energy needed to break the starting materials. Do the reverse for products.
delta H = reactants - products.

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posted by DrBob222
3. When Hydrazine burn in oxygen,6 bonds are broken. Below is the list of bonds broken;
4xC-H
N-N
O=O

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4. When Hydrazine burn in oxygen,6 bonds are broken. Below is the list of bonds broken;
4xN-H
N-N
O=O

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5. Number of bonds formed

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posted by Nzaki
6. Calculate total energy needed to break the bond of the gas hydrazine burns in oxygen

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posted by Atemis

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