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Topic :: Time
Question 51 - A batch reactor is designed for the system of the irreversible, elementary liquid-phase hydration of butylene oxide that produces butylene glycol. At the reaction temperature T = 323 K, the reaction rate constant is k = 0.00083 L / (mol - min). The initial concentration of butylene oxide is 0.25 mol / L = Ca. The reaction is conducted using water as the solvent, so that water is in large excess. (a) Let the molecular weight of water is 18 g / mol and the mass of 1 kg in 1 L of water, calculate the molar density of water, Cb in the unit of mol / L. (b) Determine the final conversion, X of butylene oxide in the batch reactor after t = 45 min of reaction time. Use the formula X = 1 - 1 / exp [ kt (Cb) ] derived from material balance. (c) Find the equation of t as a function of X.
1 3059Question 52 - The half-life for first order reaction could be described in the differential equation dC / dt = -kC where k is a constant, C is concentration and t is time. (a) Find the equation of C as a function of t. (b) Find the half life for such reaction or the time required to reduce 50 % of the initial concentration, where k = 0.139 per minute. (c) When the initial concentration Co is 16 mol / cubic metre, how long does the reaction required to achieve the final concentration of 1 mol / cubic metre?
1 2441In case of HV test on medium voltage cables, BS is asking for 4 U0 where as IEC is asking for 3.5 U0. Can any one advise me how this 3.5 times or 4 times U0 is derived?
1697how memory will be used in the JVM.With think time .what is necessary of the think time in loadrunner
HCL,
1 3838During the main stator winding insulation testing (phase to ground)of 11kv alternator (Lerysomer) i found 0 and resistance with multimeter and found 20 killo ohm while the power cables are connected both end (Generator & VCB). In VCB PT (Potential transformer) are connected. Please any body explain that method of insulation is correct or not? also describe of PT connections
1 2922Hi,by usining ptf how we have to combine (likr merge)10 datasets at a time in the oracle database(and write a macro code also)?Like this i have a douts a lot if you dont mind may please send one text mail for me(madhusudhanap16@gmail.com)?
1692what happening if we casting HV shunt reactor foundation pad at 50cm height different time (One day difference)
EEP,
1813Hi i went for interview 3 times got rejected my gre 280 ielts 5.5 dont no what is the problem with me for the 3rd time i went with confidence but they asked only 2 ques and gave the 214b so please any one guide me how to clear for next time thank you
2559
What is the SimpleTimeZone class?
If we opened Windows Internet Explorer 4 times, does it starts 4 processes or 4 threads?
How to set the time zone for MySQL to particular country time?
I am fresher and i have completed my software testing course and i don't have real time experience,can anybody help me regarding financial domain projects,main testcases in that domain.
What is a time reference characteristic?
What is RCW (Run time Callable Wrappers)?
I am surekha new commer for this site? I have some doubt's pls clarify it..... I finished my B.tech and S/w Testing Course Now iam searching for a job in Testing, I did not have any experience in real time projects. Any body can send me the sample Testcases,Srs,Matrix for Banking,ERP Projects etc.Here is my email id surekhai@yahoo.com
what is the Property used to add a menus at runtime?
What is the important aspect of a real-time system?
There is very little time to test due to the development team delay how will you handle this situation?
How u r managing the time constraints in completing the project?
How will you load dynamic assembly? How will create assemblies at run time?
Would you be able to do time-recording?
Describe a time where a creative approach to meeting an objective didn?t work and what you did next?
Describe a time your company did not deliver on its product or service and how you responded?
