Wednesday
October 1, 2014

Homework Help: chem- i reallyneed help

Posted by hannah on Tuesday, November 6, 2012 at 10:30am.

Consider the following equations.
N2H4(l) + O2(g) N2(g) + 2 H2O(l) H = -622.2 kJ
H2(g) + 1/2 O2(g) H2O(l) H = -258.5 kJ
H2(g) + O2(g) H2O2(l) H = -187.8 kJ

Use this information to calculate the enthalpy change for the reaction shown below.

N2H4(l) + 2 H2O2(l) N2(g) + 4 H2O(l) H = ?



i really do0nt know how to do these

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

please check my answer - Consider the following equations. N2H4(l) + O2(g) N2(g...
Chemistry - Hydrazine, N2H4, is a colorless liquid used in rocket fuel. What is ...
CHM - Need help please Which of the following equations has the coefficients 2,1...
Chemistry - I'm having a hard time balancing the following chemical equations...
CHEMISTRY - Consider a 58.4 g sample of H2O(g) at 125C. What phase or phases ...
chem urgent! - Set up a Hess's law cycle, and use the following information to ...
Chem - Balancing equations? NaOH + H3PO4 ----> Na3PO4 + H2O C3H8 + O2 ---->...
chemistry - Balance each of the following equations a)CH4+CL2......>CCl4+HCl...
Chemistry(Please check) - Which of the following equations correspond to the Ka2...
chem - Section: Ionization expressions, Weak Bases Using the equilibrium ...

Search
Members