Practice: Calculate the ∆Hrxn for the following thermochemical equation:
When given the following:
Hess's Law involves the use of partial reactions in the determination of the overall enthalpy of reaction.
Hess's Law
Concept #1: Rearrangement of Thermochemical Equations
Example #1: If the formation equation for boron trioxide is given as the following:
What will be the new enthalpy value when it is rearranged?
Concept #2: Applying Hess’s Law
Example #2: Calculate the ∆Hrxn for overall reaction:
When given the following set of partial reactions:
Practice: Calculate the ∆Hrxn for
Given the following set of reactions:
Practice: Calculate the ∆Hrxn for
Given the following reactions:
