1
$\begingroup$

On some books I found values of enthalpy in J/g, on other books in kJ/mol. How could I convert enthalpy from J/g to kJ/mol?

Thank you.

$\endgroup$

closed as off-topic by FGSUZ, Jon Custer, Buzz, ZeroTheHero, Kyle Kanos Jan 4 at 11:01

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Homework-like questions should ask about a specific physics concept and show some effort to work through the problem. We want our questions to be useful to the broader community, and to future users. See our meta site for more guidance on how to edit your question to make it better" – FGSUZ, Jon Custer, Buzz, ZeroTheHero, Kyle Kanos
If this question can be reworded to fit the rules in the help center, please edit the question.

1
$\begingroup$

You need to know the molar mass $M$ ($\mathrm{g/mol}$) of the material (substance).

Say the Enthalpy in $\mathrm{J/g}$ is $H_w$, then the Enthalpy in $\mathrm{J/mol}$ is $H_M$, with:

$$H_M=H_w\times M$$

Divide by $1000$ to convert to $\mathrm{kJ/mol}$.

If the material is not a pure substance (i.e. a mixture) then you need to calculate a molar average for $M$ of the material.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.