An exothermic reaction is carried out in a coffee-cup calorimeter. Which of the following statements is/are NOT true for the process? Support your answer. a) Heat is absorbed by the water b) The enthalpy of the products is higher than the enthalpy of the reactants c) The temperature of the water increases d) Qrxn +Qwater = 0 e) Qrxn > 0 f) Qwater = Qrxn

Normal butane is catalytically isomerized to isobutane. A fresh feed stream containing pure n-butane at temperature T, is mixed adiabatically with a recycle stream containing n-butane and isobutane, and the combined stream is fed to the reactor, where some but not all of the n-butane in the feed is converted. The reactor effluent is pumped to a distillation column. The overhead distillation product contains primarily isobutane and a small amount of n-butane. The bottoms product, which also contains both species, is the stream recycled to the reactor. The streams leaving the distillation column are at different temperatures. a) Determine the number of degrees of freedom associated with the feed mixer, the reactor, the distillation column, and the entire process. Include all unknown process stream temperatures and process unit heat duties in your analysis. b) Suppose a single-pass conversion of 35.0% is attained in the reactor, the overhead distillation column product contains 88.5 mole…

when acetone is heated in the gas phase, decomposition into ketene and methane takes place according to: (CH3)2CO > CH2-CO + CH4 the reaction is irreversible and first order. The rate constant is 1.047 s-1 vid 725 C. Calculate the turnover of acetone obtained in an isothermal and isobaric tube reactor under the following operating conditions. The reactor is made up of 20 parallel connected tubes, each with a length of 10 meters and an inner diameter of 10 cm. The working pressure is 4 atm and the temperature is 725 C. The acetone supply amounts to 120 mol/s.

A8

Solve correctly please.

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)

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.

Q2- The synthesis of ammonia proceeds according to the following reaction N₂ + 3 H₂ -----> 2 NH3 In a given plant, 4202 lb of nitrogen and 1046 lb of hydrogen are fed to the synthesis reactor per hour. Production of pure ammonia from this reactor is 3060 lb per hour. a. What is the limiting reactant. b. What is the percent excess reactant. c. What is the percent conversion obtained (based on the limiting reactant).

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Please answer correctly b/c last time it was wrong When zinc metal reacts with oxygen gas, 2Zn(s) + O2(g) → 2ZnO(g), large amounts of light and heat are released. A student states that this reaction is a combustion reaction but not a redox reaction. Do you agree? Defend your answer by explaining whether or not it meets the requirements of each type of reaction.