30 multiple-choice questions in College Board exam style. Each has four choices and a full explanation of why each option is right or wrong.
Always check the sign convention in ΔG = ΔH − TΔS carefully. A favorable process needs ΔG < 0, which depends on the signs of ΔH, ΔS, and the value of T.
Thermodynamic favorability and reaction rate are unrelated. Don't assume a favorable reaction happens quickly, that's a kinetics question.
Oxidation always happens at the anode, reduction always happens at the cathode, in both galvanic and electrolytic cells.
Read the explanations even when you got it right. Each one teaches a small fact that often returns in a different form on the exam.