Zinc metal can be obtained from ZnO, by reaction at high temperature with CO, ZnO (s) CO(g) ->Zn(s) CO2 (g) The carbon monoxide (CO) is obtained from reaction; C (s) O2(g) -> CO(g) If 68.0g ZnO and 13.0g O2 were used, how many grams of Zinc would be produced

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?