Posted by Jason on .
What is the absolute entropy of 2.5 mol of gaseous methane at 1.3 bar and 298 K?

Entropy question 
drwls,
The JANAF Thermochemical tables give an absolute entropy value of
44.49 cal/mol*degK at 1.0 bar and 298 K. Apply a pressure correction to that. Also multiply by the number of moles, 2.5.
You will find the pressure correction formula you need at
http://en.wikipedia.org/wiki/Entropy