For each of the following cases, decide whether the pH is less than 7, equal to 7, or greater than 7. Equal volumes of 0.45 M acetic acid, , and 0.45 M are mixed. The pH is . 25 mL of 13 M is mixed with 13 mL of 0.026 M . The pH is . 100 mL of 0.10 M is mixed with 50 mL of 0.20 M . The pH is . 48 mL of 0.20 M is mixed with 48 mL of 0.40 M .

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?