Question

can any one help me with this question please!

Answer 1

What is it?

Answer 2

Eh, i dont want to download it sorry

Answer 3

Do you have pictures?

Answer 4

ok I will try to type it!

Answer 5

ok

Answer 6

Calculate the Delta H reaction for the reaction below:
N2H4(L)+ O2(g)-----> N2(g)+ 2H2(L)
Given:
1-2NH3(g)+3N2O(g)----> 4N2(g)+3H2O(L) Delta H rxn=-1010KJ
2-N2O(g)+3H2(g)-------> N2H4(l)+H2O(L) Delta H rxn=-317KJ
3-2NH3(g)+1/2O2(g)----->N2H4(l)+H20(l) delta H rxn =-143Kj
4-H2(g)+1/2O2(g)----->H20(l) Delta H rxn= -286kj

Answer 7

OH

Answer 8

Ok i got this

Answer 9

sorry I typed the wrong question than I retyped the correct one :( thanks alex for your patient !!

Answer 10

Let me write it out wait up, i just got done studying this

Answer 11

Thank you I am trying to understand it,but I couldn't !

Answer 12

you just have to switch the equations around to get delta H, you want to get the right reactants on one side and the right products on the other, so you switch them around, cancel the ones you dont need if theyre the same. Once you switch the equation the Delta H is also switched

Answer 13

Did you write the numbers infront of the equations given 1-4, or did they give you them

Answer 14

they gave it is Roman numbers

Answer 15

do I flip them all or only 2 and 3?

Answer 16

for 2 and 3 i think you have to multiply by 1/2

Answer 17

and switch them

Answer 18

so the N2H4 add up to one

Answer 19

Ok I will try it out

Answer 20

This isnt adding up

Answer 21

It is not adding up :(

Answer 22

Im getting left with extra n20, and h2

Answer 23

You cant get a picture using the snipping tool?? I want to see if everything is correct, because the values arnt cancelling out

Answer 24

I dont see the snipping tool??

Answer 25

What type of computer do you have

Answer 26

apple mac

Answer 27

Im having trouble with the N2 because its asking for 1 mol of product, but the chemical reactions only show 1 N2 with 4 mol of product, so youd have to divid the delta H by 4 to get 1 mole of N2, but it would make the N20 and the H20 decimals.

Answer 28

I double checked it and that's how the question was given, I did get decimals too..

Answer 29

let me ask my friend

Answer 30

thanks Alex, I will keep trying ... hopefully I will get it

Answer 31

Yeah because if we divide the N2 by four to get the 1 mol of product, we would have to divide the other equations to cancel out the H20 and N20

Answer 32

By when do you need this done

Answer 33

By Tuesday

Answer 34

Alright, Im going to ask about it tomorrow to my prof. If no one answers it by tomorrow afternoon i will have an answer for you

Answer 35

Great ! I am going to seek help from tutors tomorrow, and I will check it with you after noon thanks a lot for you help!

Answer 36

Yup you too, i want to learn about it as well, see you tomorrow!

Answer 37

ok see you :)

Answer 38

I got it when I added them at the end I divided by 4