heat rxn

Moderators: Chem_Mod, Chem_Admin

josmit_1D
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

heat rxn

Postby josmit_1D » Sun Jan 26, 2020 3:22 pm

what is the method to calculate the heat of reaction?

MeeraBhagat
Posts: 95
Joined: Sat Aug 24, 2019 12:15 am

Re: heat rxn

Postby MeeraBhagat » Sun Jan 26, 2020 3:41 pm

You can find the bond enthalpies of the reactants and products involved in breakage/forming of bonds in the reaction and then add those enthalpies to find the total enthalpy of the reaction. You can also calculate (total enthalpy of products) - (total enthalpy of reactants) which will yield the total enthalpy change of the reaction.

SnehinRajkumar1L
Posts: 101
Joined: Thu Jul 11, 2019 12:15 am

Re: heat rxn

Postby SnehinRajkumar1L » Sun Jan 26, 2020 3:41 pm

There are 3 methods he described in class. You can add the bond enthalpies between the molecules and do broken - formed. If you have 2 reactions, you can add up the enthalpies to find the enthalpy of reaction for the combined one. Finally, you can use the enthalpy of formation to find it (products - reactants).


Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

Who is online

Users browsing this forum: No registered users and 2 guests