The efficacy of these substances is proportional to the hyperbolic tangent of the Thiele modulus.
Fine-tuning of the work functions of these substances results in the "electrochemical promotion" of them in the presence of a current. The efficacy of these substances is proportional to the hyperbolic tangent of the Thiele modulus. The Sabatier ("sah-bah-tee-AY") principle predicts a local maximum for the heats of adsorption of these substances, which can be shown on a volcano plot. A hot, powdered substance of this kind moves from the "regenerator" to the "riser" during the industrial cracking of petroleum. Quaternary ammonium salts function as "phase-transfer" examples of these substances. The turnover number quantifies the efficiency of these substances, which are said to be "heterogeneous" if they are in a different phase than the rest of the reaction, and which by definition are not consumed in a reaction. For 10 points, name these substances that accelerate the rates of reactions.
Fine-tuning of the work functions of these substances results in the "electrochemical promotion" of them in the presence of a current.
catalysts &lt;Chemistry&gt;