Entropy

[andrea guzman 1F]

How does constant pressure affect entropy change and how does constant volume affect entropy change?

[Alexa Garcia]

If volume decreases then there is less space to explore thus entropy decreases. If the pressure decreases, then volume has increased, and entropy will also increase.

[106062642]

Constant volume and constant pressure have different impacts on entropy change. Entropy change at constant pressure is proportional to temperature (T) and heat transfer (q), as expressed by the formula ΔS= q/T. Entropy rises as a system gets more disordered when heat is introduced at constant pressure (q>0), but it falls when heat is removed (q<0). On the other hand, at constant volume, variations in temperature and the type of process are the main factors influencing entropy change. Greater disorder results from heating a system at constant volume because increasing molecular motion raises entropy, whereas decreasing molecular motion reduces entropy.