Determine whether the stopcock should be completely open, partially open, or completely closed for each activity involved with titration. Filling the buret with titrant Choose... At the beginning of a titration Choose... Close to the calculated endpoint of a titration Choose... Conditioning the buret with titrant

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?