Entropy vs Enthalpy: Which is the Better Calculation for Heat Transfer?

[causader90776]

When calculating heat transfer, how would one know when to use Q=T*m*(delta s) versus Q=m*(delta h). I'm confused when we should calculate using entropy versus enthalpy. Anything helps. Thank you!

 

[Simon Bridge]

Welcome to PF;
You use whichever makes the maths simplest.
You may be thinking of:
http://2ndlaw.oxy.edu/gibbs.html