Tuesday
March 31, 2015

Homework Help: Chemistry

Posted by Alex on Friday, November 8, 2013 at 9:22pm.

I need help I can't seem to get the right answer. Please help!
1/2 H_2 (g) + 1/2 Cl_2 (g) --> HCl (g) -92.3 kJ/mol
Na(s) + 1/2 O_2(g) + 1/2H_2(g) --> NaOH(s) -426.8 kJ/mol
NaCl(s) --> Na(s) + 1/2Cl_2(g) 411.1 kJ/mol
H_2O(l) -->H_2(g) + 1/2O_2(g) 285.8 kJ/mol
HCl(g) --> HCl(aq) -75.2 kJ/mol
NaOH(s) --> NaOH(aq) -41.8 kJ/mol
HCl (aq) + NaOH (aq) --> NaCl (aq) + H_2O (l) -56 kJ/mol

I need the dH for H for NaCl(s) NaCl(aq) kJ/mol
I keep getting -411.1 kJ /mol but it says it's wrong what am I doing wrong?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry(Please check) - Which of the following mixtures will be a buffer when ...
chemistry - Which of the following mixtures will be a buffer when dissolved in a...
Chemistry - The reaction has an equilibrium constant of Kp=2.26x10^4 at 298 K. ...
Chemistry - I have troubles with a titration of NaOH and HCl. The volume of the ...
CHEM - Can you please check my work? I got -4.3KJ/mol If this is not right can ...
CHEM - Which of the following mixtures will result in the formation of a buffer ...
chemistry - So I did a titration lab at school with NaOH and HCl. i have to find...
Chemistry - 1. A good indicator will have a(n)____ close to this volume and pH. ...
CHEMISTRY - 1) An NaOH solution of unknown concentration is titrated with HCl. ...
Chemistry - 1.9 mol HCl and 3.8 mol NaOH react according to the equation HCl + ...

Members