自测验英文试卷二.doc

自测验英文试卷二1. For a gas reaction at 400K the rate is reported as –dPA/dt = 10PA2 atm/hr，what is the value of the rate constants for this reaction is the rate equation is expressed as (15) -rA = - = kCA2 mol/m3min2. If –rA = -dCA/dt = 5CA3mol/l*s, when CA = 1mol/l what is the rate of the reaction when CA = 10 mol/l?(15)3. Explaining the Thiele modulus.(15)4. A vessel is to be used as a reactor for a liquid -rA = k CA k = 0.3 min –1the RTD distribution is followed :t min 10 20 30 40 50 60 70 80 c (g/l ) 0 3 5 5 4 2 1 0 (1) calculate the mean residence tine of liquid in the vessel (2) Calculate the real conversion.(20)5. A liquid reactant stream (mol/l) passes through two mixed flow reactors in series The concentration of A in the exit of the first reactor is 0.6mol/l find the concentration in the exit stream of the second reactor .The reaction is first –order with respect to A and V2/V1 = 1.5(20)6. Try to explain the K-L model .(15)。