Standard Heat of Formation

Explanation of standard heat of formation, and example to calculate enthalpy using standard heat of formation data. There is an error. Delta H for the decomposition of CaCO3 is -179 kJ/mol. I apologize for any confusion.

[@baraskparas9559]

Best chemistry channel on RUclips by far for concise explanations and thoroughness.

[@OldSchoolChemistry]

Hi Barask! I sure appreciate your support and keeping the algorithm moving favorably. I hope you are well!

[@The_Ridha]

From Iraq ❤ THANK you very very VERY MUCH ❤

[@OldSchoolChemistry]

Hi The_Ridha, you are very welcome. Sending love to you in Iraq:)

[@vinayakch790]

Wow 😮 your explanation is beautiful like you mam splendid explanation ❤

[@OldSchoolChemistry]

Hi Vinayakch, I am so glad the explanation was helpful! Thank you for your comment:)

[@vishaltheveindran1514]

Thank you excellent explanation

[@OldSchoolChemistry]

Hi Mishaltheveindran, thank you and thank you for commenting! I hope your class goes well:)

[@ayadkindi5467]

extremely useful!!

[@OldSchoolChemistry]

Hi Ayadkindi - thank you for your comment:)

[@ameliason5072]

Thanks for the great explanation! Still a student and not really sure about chemistry but, is this reaction endothermic one?

[@OldSchoolChemistry]

Hi Amelia, If delta H is + it is endothermic. If delta H is - it is exothermic. I hope that helps! I am proud of you for taking chemistry:)

[@daddydeggo9955]

When plugging in the numbers I keep Getting -179 for delta H

[@OldSchoolChemistry]

Hi Daddy Deggo, you are correct! Thank you for catching that:) I updated the description with the correction. Thank you again.