Liquid isobutane is throttled through a valve from an initial state of 360 k and 4,000 kpa to a final pressure of 2,000 kpa.
estimate the entropy change of the isobutane.
assume that changes in temperature and volume are negligible during throttling.
volume could saf be estimated from eq. (3.72).

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.