Type or paste que

One mole of an ideal gas CP=7R2 in a closed piston/cylinder arrangement is compressed from Ti=200 K , Pi=0.5 MPa to Pf=5 MPa by following paths:.

1. ADIABATIC path
2. ISOTHERMAL path

Calculate ΔU, ΔH, Q and W_EC for both paths.

NOTE: Keep the answers in terms of ‘R’.

stion here

The dehydrogenation of ethanol is carried out by the following reaction:

C2H5OH g→CH3CHO g+H2(g)

The heat given by the reactor is 23500 kW. If the inlet flow rate is 150 mol/s C₂H₅OH at 298.15⁰C and the reaction conversion is 100%, calculate the temperature of the outlet stream. Note that there is no external work involved in the reactor. Use Heat of Formation method. NOTE: Take CP=A

NOTE: Cp,CH3CHO=1.693+0.018T (J/mol/K)

CH3CHO          Acetaldehyde

Estimate the volume occupied by 18kg of ethylene at 55 degree celcius and 35 bar? what method should i use in this case and why? (method can be generalized cubic equation of states, pitzer correlations for 2nd virial coefficient, or pitzer correlations for compressibility factor)

1. Write the names of any two Analytical Instruments. Also write their applications.

4. Write the names of main analytical techniques that are commonly used. Also write the main principles at which these techniques work.

At what pH is the cell potential of the following half-cell +1.20 V?
Cr2O₇ ^2- (aq) + 14H⁺ (aq) + 6e^- → 2Cr₃ + (aq) + 7H₂O (l)
The temperature is 298 K, the pressure is 1 bar and the concentration of Cr2O₇ ^2- (aq) and Cr₃⁺ (aq) is 1 mole dm^-3

1 a) Water can decompose to hydrogen and water vapor at high temperatures. You're pondering a little
this and suggests the following mechanism:
?₂? → ?? + ? Ka
? + ? → ?₂ Kb
?? + ?? → ?₂?₂ Kc
?₂?₂ → ?₂ + ?₂ Kd
From this information, derive an expression of the hydrogen formation rate. Don't forget to clearly state any assumptions you make.

b) Suggest what information could be used to either support the mechanism or reject it. Don't forget to justify your suggestions.

c) You realize that the first reaction must be able to go the other way too. Would this affect yours proposed mechanism in any way? Note that you do NOT have to derive a new expression, but well motivate your answer.

1 a) Determine the enthalpy change for the following reaction under standard conditions and 25 ° C:
2Hg (l) + Cl₂ (g) → Hg₂Cl₂ (s)
enthalpy for : Hg (l) = 0
  Cl₂ (g) = 0
Hg₂Cl₂ (s) = -265.22
b) The entropy change is for the reaction is -182.61 J K-1 mol-1 at standard conditions and 25 ° C. Is the reaction spontaneous under standard conditions and 25 ° C?
c) What will be the enthalpy change at 100 ° C?

What's the objective of precursor preparation experiment?

And why the color of precursors changes during the experiment?

A 4,500 litre tank contains 2,500 litres of brine. There is 50 kg of salt initially present. Pure water is being put into the tank at 20 litres/min. Brine solution is draining away at a rate of 15 litres/min.
a)Create a mathematical model of the dissolved salt in the solution. Give amount of salt in terms of time (t).
b)Calculate how much salt is in the system after 15 minutes. State all of the assumptions that you are using.
c)Create a working MATLAB program which deploys your mathematical model above. It is important to show the steps that you have chosen to create your mathematical model of this system.

(C2H5OH) is a common alcohol used in food, beverage and pharmaceutical industries. The production of ethanol is through fermentation of glucose (C6H12O6) in a reactor, which produces ethanol and carbon dioxide (CO2). Unfortunately, glucose fermentation also produces propenoic acid (C2H3CO2H) and water (H2O) in a side reaction. A production engineer is designing a glucose fermentation process that produces 46 000 kg of ethanol. The conversion of glucose in this process is 80 % and the selectivity of ethanol production to propenoic production is 20. (Atomic mass : C = 12, H = 1, O = 16) (a) Write stoichiometric equations for the main and side reactions of the process. (b) Draw and label completely the process flow diagram of this process. (c) Calculate the degree of freedom for this process based on Extent of Reaction method. (d) Using Extent of Reaction method, determine the amount of feed (kg) and molar composition of the product stream (%). (e) Determine the yield of ethanol in the designed process.

Q2 (a) Discuss the importance of reaction orders, reaction rates and reaction rates as a function of temperature. (b) Reactant M decomposes in gas phase at 850oC and 4.6 bar according to the reaction in (2a) while the first order rate is given by (2b). Calculate the reaction volume that will yield 95% conversion of feed consisting of 3Moles of M per hour. Assume the reaction takes place in PFR, C is concentration of M. M(g)→P(g) + 6W(g) (2a)

-r=10/hrs (2b)

question one 100 kg of a gas has the following mass composition: 19.3% CO2, 6.5% O2 , 2.1% H2O and 72.1% N2

What is the mole fraction of each component in the mixture?

Molecular weight of (CO2= 44, O2=32, H2O=18, N2=28)

question two The density of a certain solution is 1.05 g/cm3 at 25°C. How many cubic meters will be occupied by 5000 kg of this solution.

1. After having dinner at a fancy restaurant furnished with navy blue table runner, you notice the sleeves of your white wool jacket has turned blue. What do you think caused this to happen? What standard test method would you use to evaluate the color?

Why are reactors often operated adiabatically instead of isothermally? How can you keep a reactor adiabatic?