Ammonia gas is compressed from 21°c and 200 kpa to 1000 kpa in an adiabatic compressor with an efficiency of 0.82. estimate the final temperature, the work required, and the entropy change of the ammonia.

Solid tin exists in two forms: white and gray. for the transformation sn(s, white) → sn(s, gray) the enthalpy change is -2.1 kj/mol and the entropy change is -7.4 j/(mol*k). a. calculate the gibbs free energy change for the conversion of 1.00 mol white tin to gray tin at -30℃. b. will white tin convert spontaneously to gray tin at -30℃? c. at what temperature are white and gray tin thermodynamically equivalent at a pressure of 1 atm?