I'm trying to use the thermodynamics module, among others, to display enthalpy but it doesn't seem to work.


  • 1
    Can you be a bit more specific on the doesn't seem to work part? Right now, there are issues on MikTeX, reports have already been made.
    – Johannes_B
    Oct 6, 2015 at 11:19
  • If \usechemmodule is undefined then you have an outdated version and you should just leave it away. If you get errors about modules not loaded then I suspect you're using MiKTeX: there are known issues which should be fixed soon (sourceforge.net/p/miktex/bugs/2403). Meanwhile you can use \usepackage[compatibility=4.7]{chemmacros}, leave \usechemmodule away, and work with the older version. (Beware that then the command was called \Enthalpy)
    – cgnieder
    Oct 6, 2015 at 11:38
  • (The older manual is available here: github.com/cgnieder/chemmacros/releases/tag/v4.7)
    – cgnieder
    Oct 6, 2015 at 11:40
  • Sorry for the jumble. I'm using sharelatex.com but I also tried running it on MacTeX. The first message I got was that \enthalpy was undefined. When I added \usechemmodule{all}, it said \usechemmodule was undefined as well. Oct 6, 2015 at 14:35
  • 1
    I suppose that sharelatex is still shipping an older version of chemmacros. I'm not sure about their update policies, but in general web-LaTeX services aren't the fastest, I seem to have gathered.
    – moewe
    Oct 6, 2015 at 15:54

1 Answer 1


The following should work both with versions prior to v5.0 and current versions:


% versions below 5.0 don't have the macro. Let's provide it
% to expand to the “false” branch if it isn't defined:

% let's check if the current version of chemmacros (or rather the
% compatibility mode it is used with) is 5.0 or newer:
  % load all the modules we need. “all” is overkill but will do:
  % in the new versions \Enthalpy is called \enthalpy. Let's
  % take care we can use the same command either way:




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