Consider the dissociation of Hydrogen Sulfide: 2 H2S (g) 2 H2(g) + S2 (g) (endothermic reaction) %D What is the effect if hydrogen sulfide is removed from the system at equilibrium

When the nuclide iron-55 decays by electron capture: The name of the product nuclide is The symbol for the product nuclide is 1S

The decomposition of NO into N2 and O2 occurs via elementary steps consisting of: (1) quasi-equilibrated molecular adsorption of NO; (2) irreversible dissociation of adsorbed NO by interaction with a neighboring free site; (3) irreversible recombination of adsorbed N atoms to form N2; and (4) quasi-equilibrated desorption of adsorbed O atoms to form O2.The reaction is catalyzed within porous catalytic pellets of slab geometry (thickness = 2L). Write the mechanism of the reaction with the stoichiometric number of each step.  Derive the rate expression in terms of constants and measurable quantities, assuming O* is the MARI/MASI.

Given the reaction C,H16+11 O2→7 CO2+8 H20 determine the extent of reaction if 100 g mol of O2 enter a reactor, and 8 g mol of O, leave the reactor. Also determine the amount of water formed.

The decomposition of NO into N2 and O2 occurs via elementary steps consisting of: (1) quasi-equilibrated molecular adsorption of NO; (2) irreversible dissociation of adsorbed NO by interaction with a neighboring free site; (3) irreversible recombination of adsorbed N atoms to form N2; and (4) quasi-equilibrated desorption of adsorbed O atoms to form 02. The reaction is catalyzed within porous catalytic pellets of slab geometry (thickness = 2L). a) Write the mechanism of the reaction with the stoichiometric number of each step. b) Derive the rate expression in terms of constants and measurable quantities, assuming O* is the MARI/MASI. c) The steady-state condition for the porous slab is shown below (A=NO): Саб Bulk BL CATALYS SLAB BL Bulk CAB2 САБ At high oxygen pressures, the concentration of oxygen can be assumed as constant and lumped into the rate constant, leaving the reaction rate as first order in (NO). Assume that the internal effectiveness factor in the catalyst slab is 0.2.…

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.

Which of the following term/s is/are true about tacticity? i. Tacticity affects the degree of crystallinity. ii. Tacticity is a polymer property that occurs as a result of chain length and chain structure. iiI. An isotactic polymer shows greater resistance to dissolve in solvents than its atactic and syndiotactic forms. iv. An atactic polymer is melted at higher temperatures than its isotactic and syndiotactic forms. v. When an isotactic polymer is melted, it shows higher melt viscosity than its atactic and syndiotactic forms. I, II, II, Nand V A I, Ill and V III, VandV NandV

The reaction specific heat is -3489.63. This reaction is self-sustaining or not? Why?

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.

The pyrolysis of ethane proceeds with an activation energy of about 75000 çal How much faster is the decomposition at 650 °C than at 500 °C ?