Recent content by Trowa

That makes sense; pure OH- could than still be positive but that is hard to isolate. Maybe the entropy is lower in water because the anions can be closer together than without solution (strong repulsion) (basically: the reference point must be higher in entropy). Thanx!

Physical chemistry (Atkins) - 8th edition And this question appeared on my exam. Do you know more about negative entropy?

Hi there! The Standard molar entropy of H+ and H2O are positive. But OH- has a negative standard molar entropy. Can somebody explain why the standard molar entropy of OH- is negative? I just can't imagine how entropy could be negative. Thanx in advance!

Thanx for the fast response. :smile:

Hi there! I have to determine the work done of a reversible adiabatic expansion. Becauce the system is adiabatic: Q = 0 so \DeltaU = Wrev Becauce both the pressure and the volume changes I can't use W = pex\DeltaV. Homework Statement Cv, Cp, Ti, Tf, Pi, Pf, Vi, Vf are known The Attempt...