the question is:
this question is about hydrazine, N2H4, and ammonia, NH3. These are both compounds of nitrogen and hydrogen.
the equation is : N2H4 + O2 ----> N triple bond N + 2H2O
some average bond enthalpies are given below:
N-N = +163
N triple bond N = +945
N-H = +390
O=O = +497
O-H = +463
Use the data to calculate the enthalpy change for the reaction of hydrazine with oxygen, as shown.
I got -577, but the answer is +577??
I'm not sure why it's positive; pls help!!!!!!!