Consider the gas phase reversible reaction 2A ↔ B that occurs at atmospheric pressure.

a) If the equilibrium constant Ka = 0.1, what are the equilibrium mole fractions of A and B?

b) Assuming the reaction is elementary, write the rate law using kA and k-A as the forward and reverse rate constants, respectively. What is the equilibrium constant Kc in terms of kA and k-A? Assuming an ideal gas system, write an expression for Ka in terms of kA and k-A. If the temperature is 25oC, what is the value of KC?

c) Assuming the reaction is elementary, and that the forward reaction rate constant kA is 2.4 L/(mol·min), determine the time for the reaction to reach 80% of equilibrium in a constant volume batch reactor. Use the value for KC you obtained in part d to solve the problem.

Two major functions of the Battery Management System (BMS) are Contactors Control and Cell Protection.
a. What are the information (data) needed to perform cell protection in battery pack?

1.      Which of the following must be satisfied by the flow of any fluid, real or ideal?

I. Newton's second law of motion

II. the continuity equation

III. the requirement of a uniform velocity distribution

IV. Newton's law of viscosity

V. the principle of conservation of energy

a)      I, II, and III

b)      I, II, and IV

c)      I, II, III, and N

d)      I, II, and V

e)      I, II, N, and V

3.      Surface tension has which of the following properties?

I. It has units of force per unit length.

II. It exists whenever there is a density discontinuity.

III. It is strongly affected by pressure.

a)      I only

b)      II only

c)      III only

d)      I and II

e)      I, II, and III

1)Which fuel was more efficient (produced more calories per gram)? Explain your answer. Fuel canister: (diethylene glycol) or Tea candle: (paraffin) ?

2)Explain the difference in the efficiencies of the fuels you tested based on the chemical structures of the fuels.

3)Conduct research on both diethylene glycol and paraffin wax; for each fuel, summarize in your own words in one or two sentences how these fuels are synthesized. *******Cite the sources that you use for your research.***********

4)What are the possible sources of error in this experiment? How could the errors be reduced in future experiments?

5)Compare the amount of carbon dioxide released in one year from burning coal to power 10, 65-watt incandescent bulbs with the amount released from powering 10, 13-watt compact fluorescent light (CFL) bulbs. Assume the bulbs are on four hours per day for 365 days. You will need to determine the kilowatt hours (kWh) used. First, multiply the wattage of the bulbs by the number of light bulbs to determine the total watts used in one hour. Then multiply the result by time in hours to obtain the watt hours. Next, divide the result by 1000 to obtain kilowatt hours. On average, 2.1 pounds of carbon dioxide are released for every kWh of electricity produced.

A fuel gas containing 85.0 mole% methane and the balance ethane is burned completely with 25.0 % excess air.

The stack gas leaves the furnace at 800.0 °C and is cooled to 350.0 °C in a waste-heat boiler, a heat exchanger in which heat lost by cooling gases is used to produce steam from liquid water for heating, power generation, or process applications.

"A".Taking as a basis of calculation 100.0 mol of the fuel gas fed to the furnace, calculate the amount (magnitude) of heat (MJ) that must be transferred from the gas in the waste heat boiler to accomplish the indicated cooling ?(...........MJ)

"B". How much saturated steam at 50.0 bar can be produced from boiler feedwater at 40.0 °C for the same basis of calculation?(...............) kg water

CAt what rate (kmol/s) must fuel gas be burned to produce 1080.0 kg/h of saturated steam (an amount required elsewhere in the plant) in the waste-heat boiler?

What is the volumetric flow rate (m³/s) of the stack gas leaving the boiler?

(Assume all the heat transferred from the gas goes into the steam production).

.... Please do not round any numbers....

Hi,

I would like the numerical solution for this task so I can be able to model it in a kinetic modeling programme like Berkely Madonna (BM). This was the reason why I started my membership with Chegg Study but unfortunately, the solution to this problem was not available. I'm looking forward to hearing from you.

you will find the task in de link below.

With kind regards,

Ahmed

https://www.chegg.com/homework-help/comprehensive-problem-multiple-reactions-heat-effects-styren-chapter-12-problem-24qp-solution-9780132317160-exc

in J.Snyder en B.Subramaniam, Chem. Eng. Sci., 49, 5585 (1994).

the simulation is :

{ simulatie van ethyleenproductie }

{ balance }
Kp1 = exp(b1+b2/T+b3*logn(T)+b4*T^3+b5*T^2+b6*T)
b1 = -581e-2
b2 = -13020
b3 = 5051e-3
b4 = -2314e-13
b5 = 1302e-9
b6 = -4913e-6

{ reaktor }
T = 900   {K}
Pbar = 2.3   {bar}
P = Pbar*1e5   {Pa}

{ kinetics }
r1S = k1*(Peb-Ps*Ph2/Kp1)
k1 = 1.177*exp(-21708/(R*T))
r2B = k2*Peb
k2 = 200.2*exp(-49675/(R*T))
r3T = k3*Peb*Ph2
k3 = 0.4789e-6*exp(-21857/(R*T))

{ variables }
Peb = yeb*P
Ps = ys*P
Ph2 = yh2*P

yeb = Neb/Ntot
ys = Ns/Ntot
yh2 = Nh2/Ntot

{ equations }
Ntot = Neb+Ns+Nh2

{ feed }
Neb0 =

Base your answers to the following questions on the analogies drawn for the collision mechanisms between suspended particles in coagulation/flocculation and between a suspended particle and a static collector grain in filtration.
a) List four types of physical transport (collision) mechanisms that are important to filtration and their analog among flocculation transport mechanisms (if any).
b) Which mechanism(s) would be expected to govern the collection efficiency of 0.4 micrometer particles passing into a filter?
c) If the media grain size were increased, which mechanism(s) would decrease in effectiveness of collection?
d) If the density of the influent particles increased which mechanism(s) would increase in collection effectiveness?
e) If the approach (superficial) velocity increases, which mechanism(s) would decrease in effectiveness of collection?

a.) Develop equations for X and S as a function of dilution rate for a continuous cell culture system. Assuming that the kinetics are governed by an uncompetetive inhibition model.

b.) Plot X, S and "yield of cell mass (g cells/l) per time" versus dilution rate and recommend a dilution rate to operate the reactor at if:

So = 20 g/l

Ks = 1 g/l

I = 0.08 g/l

Y x/s = 0.2 g cells/g substrate

Xo= 0

KI = .02 g/l

m = 0.75 h-1

Explain how fracking has reduced the cost of natural gas will affect the incentives for firms to invest in research into new renewable energy technologies if renewable electricity is a substitute for natural gas and coal electricity but is more expensive than either coal or natural gas right now.

Rayleigh distillation

An aqueous solution of acetic acid is to be enriched by simple (differential) distillation.

The flask is initially charged with 0.025 kmol of solution of composition 0.600 mol

fraction water.

a)

Distillation is continued until the composition of the liquid in the flask has fallen

to 0.300 mol fraction water. Assuming that the vapour is completely condensed

and collected in a cooled receiver, calculate the quantity and composition of the

distillate.

b)

Repeat the calculation for the case in which distillation is stopped when the

composition of the liquid in the still has reached 0.500 mol fraction water.

c)

Explain why separation is so poor, particularly in case (a).

Equilibrium data

x y

0.300 0.420

0.350 0.483

0.400 0.537

0.450 0.592

0.500 0.638

0.550 0.685

0.600 0.728

1. Explain Ecorr, Icorr, Epass, Ipass and Epit (on the potentiodynamic curves).

2. Compare the Control Ti and Coated Ti. Explain. Does coating show improvement in corrosion resistance?

4.14 (a) Calculate the diffusion coefficient for oxygen ions in a pure ZrO₂ electrolyte at T = 1000^∘C given ΔGact = 100 kJ∕mol, ?₀ = 1013 Hz. ZrO₂ has a cubic unit cell with a lattice constant a = 5 Å and contains four Zr atoms and eight O atoms. Assume that the oxygen–oxygen “jump”distance Δx = 1 2 a. (b) Calculate the intrinsic carrier concentration in the electrolyte givenΔh? = 1 eV. (Assume vacancies are the dominant carrier.) (c) From your answers in (a) and (b), calculate the intrinsic conductivity of this electrolyte at 1000^∘C.

introduction for chemical engineering thermodynamics