Ten kmol/hr of air is throttled from upstream conditions of 25 C and 10 bar to a downstream pressure of 1.2 bar. Assume air to be an ideal gas with Cp = (7/2)R.

a.) What is the downstream temperature?
b.) What is the entropy change of the air in J mol-1 K-1?

Hi; /c

The answers are 3.c kelvin4.b liquids only

B? i feel like this is a trick  

Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source: