Nicolas Spogis

Try to use ChatGPT free version. It's easy, but do not solve your problems.

Dear Carlos, You cannot use a Gibbs reactor for a non spontaneous reaction. This will give you totally wrong results, no matter what software you use. I suggest you read some papers and literature on Gibbs reactors before using them for reactions like this one that require catalysts (i.e., non-spontaneous). The Gibbs Reactor will simply produce an outlet in which the Gibbs free energy of the mixture is minimized and cannot be used on your case.

Unfortunately, MW is constant in DWSIM. So what you intend to do is not doable.

You can easily convert these units by having the molecular weight.

Dear Eda, You need to select the thermodynamic package as well. Just selecting the components is not enough to run any chemical process analysis software like DWSIM, Aspen, Hysys, etc. I suggest you take a course (even if online), before starting your studies with DWSIM.