Explore BrainMass

Hess's Law

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!


2CLF (g) + O2(g) --> CL2O + F20 (Hrxn = 167.4 kj/mol)

2CLF3(g) + 2O2(g) --> Cl2O(g) + 3F2O(g) (Hrxn = 341.4 kj/mol)

2F2(g) + O2(g) --> 2F2O (Hrxn = -43.4 kJ/mol)

Using Hess' law, what is the Hrxn for ClF +F2 --> ClF3 in kj/mol (assume temperature is the same)?

2. Given NO(g) + NO2(g) --> N2O3 H=-40.2kJ
N2O4(g) --> 2NO2 H=23.4kj

Calculate the enthalphy change for the following using hess' law
2N2O3(g) --> 2NO(g) + N2O4

© BrainMass Inc. brainmass.com October 25, 2018, 2:13 am ad1c9bdddf

Solution Summary

This solution explains how to use Hess's Law to calculate the heat of a reaction.

See Also This Related BrainMass Solution

Enthalpy of A Reaction Using Hess' Law

This solution will discuss how to determine the enthalpy of a chemical reaction primarily using Hess's law. The use of the general formula for enthalpy will also be addressed. These problems will be solved using both Hess's law and the general formula for enthalpy. A step by step example and answers are included.

View Full Posting Details