Hf and Hc

Moderators: Chem_Mod, Chem_Admin

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

Hf and Hc

Postby Tyler Angtuaco 1G » Fri Feb 07, 2020 8:52 pm

Question 4D 15 lists values I assumed was heat of formation, but labels them H with subscript c. What does this symbol mean and is it correct to assume it means the same as heat of formation?

Posts: 102
Joined: Fri Aug 09, 2019 12:15 am

Re: Hf and Hc

Postby KnarGeghamyan1B » Sat Feb 08, 2020 1:31 am

Hc just means it is the enthalpy of combustion, so there must be oxygen in the reactants.

Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

Re: Hf and Hc

Postby BAlvarado_1L » Sat Feb 08, 2020 6:50 am

you can use Hc the same way you would use Hf mathematically but Hc stands for enthalpy of combustion

Maika Ngoie 1B
Posts: 97
Joined: Fri Aug 02, 2019 12:16 am

Re: Hf and Hc

Postby Maika Ngoie 1B » Sat Feb 08, 2020 4:47 pm

Technically, they could be used the same way in the equation, but H subscript c is the enthalpy of combustion.

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