1. A balloon filled with helium gas has a volume of 600 mL at a pressure of 1 atm. The balloon is released upward, where the pressure is 0.4 atm. If the temperature has remained the same,
what volume does the gas occupy at this height?

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?