Chemistry Forum

Posted: **Mon Nov 11, 2024 10:36 am**

When propane burns in oxygen, it produces carbon dioxide and water. Why do chemists ignore oxygen when calculating enthalpy change?
Breaking the bonds in oxygen is necessary for it to react with propane. Doesn’t this process require energy?
I look forward to many tips.
Thanks in advance.

Posted: **Mon Nov 11, 2024 4:54 pm**

It is the result of Hess law

Elements have 0 kJ/mol, so oxygen has.

https://learningcentre.vcc.ca/media/vcc ... mation.pdf

Posted: **Tue Nov 12, 2024 4:36 am**

ChenBeier wrote: ↑Mon Nov 11, 2024 4:54 pm It is the result of Hess law

Elements have 0 kJ/mol, so oxygen has.

https://learningcentre.vcc.ca/media/vcc ... mation.pdf

Hello and thank you for your reply.
Sandro

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