(a) Consider the mass transfer-limited reaction: A → 2B DAB = 0.01 cm²s-1 What would your concentration (mole fraction) profile look like as a function of distance (i.e. z/8)? What is the flux of A?

A8

Using Le Chatilier's Pronciple to predict whether adding some HClO (aq) causes the system to shift in the direction to products or reactions: HClO + H20= H20+ ClO

1. A house needs 200,000 Btu per day so that its temperature remanins at 68oF. How much CaCl26H2O(s) needs to be used to save enough energy for one day use? The process contains the heating of CaCl26H2O(s) from 68oF to 86oF and the reaction CaCl26H2O(s) = CaCl22H2O(s) + 4H2O(g). The water from the dehydration evaporates during the process. CaCl26H2O(s): ΔHof=-2607.89kJ/gmol, Cp=1.34J/g(oC) CaCl22H2O(s): ΔHof=-1402.90kJ/gmol, Cp=0.97J/g(oC)

Calculate the formal reduction potential (E0) and the number of electrons transferred (n) for the reversible couple in the electrode reaction shown in the voltammogram below

REACTION ENGINEERING  Consider a heterogeneous gas-phase catalytic reaction:AB(g)→A(g)+B(g) (Catalyst) The surface reaction mechanism follows three steps: AB(g) +S <----> AB*S (Adsorption)AB*S<----> B*S+A(g) (Surface reaction)B*S <---> B(g) + S (Desorption) a) Derive the initial rates (AR) of the reaction, assuming there is no product (ie., A and B) in the feed (ie., PA Pao=0), assuming adsorption is the rate determining step. Use initial pressure of AB (ie., PARA), total number of sites on the surface (C), and the rate and equilibrium constants in the expressions.Hint: Based on the reaction mechanism, only AB and B are adsorbed on the surface, i.e., there is no evidence that A alone can be adsorbed on the surface.

Please answer ALL parts of the question and show your work. Consider this reaction: N2(g) + 3H2(g)  <------>  2NH2(g)          H= -123kJ Describe how the concentration of H2 will be affected by each of the following changes to the system at equilibrium. Will it increase, decrease, or not change? (a) The volume of the reaction chamber is decreased (b) Helium gas is added to the reaction chamber (c) The temperature is increased (d) N2 has is added to the reaction chamber

(Please correct answer and don't use hand rating). Consider the following reaction between naphthalene and oxygen in the gas phase with STOICHOOMETRIC FEED in a flow reactor without pressure drop: see in the image Which of the following options would be the value of the "delta" parameter taking oxygen as the limiting reagent ? a)-0,5 b)+0,5 c)-1 d)-1/9

The reaction in which CO2 decomposes to CO and a free radical oxygen atom, O, has an activation energy of 460 kJ mol. The frequency factor is 3.6 x 10+2 s. What is the rate constant for this reaction at 312 K? (Enter your answer to two significant figures.) Rate constant = S

REACTION ENGINEERING    Consider a heterogeneous gas-phase catalytic reaction:AB(g)→A(g)+B(g) (Catalyst) The surface reaction mechanism follows three steps: AB(g) +S <----> AB*S (Adsorption)AB*S<----> B*S+A(g) (Surface reaction)B*S <---> B(g) + S (Desorption) (a) Derive the rate law assuming desorption is rate-limiting. Express the overall reaction rate (- rab) in terms of total number of sites on the surface, C. partial pressures of the gas species (ie., Pab, Pa and Pb), rate constants of adsorption, the surface reaction, and desorption (ka,ks, and kd), and the equilibrium constants of adsorption, the surface reaction, and desorption (ie., K. Ks and Kd). Hint: Based on the reaction mechanism, only AB and B are adsorbed on the surface, i.e., there is no evidence that A alone can be adsorbed on the surface.