3. Estimate the values of Compressibility factor, enthalpy and entropy for Benzene and cyclohexane if it compressed from 650 K and 60 bar to 500 K and 110 bar.

What kind of materials requirements for handle cooking pot? why?

Discuss biological phosphorous removal process.  

Derive an expression of the van Deemter equation that shows how to calculate the minimum value of H based upon the values for A, B and C and not flow rate. (Assume the C terms are combined into one C term).

The following heat engines produce power of 95,000 kW. Determine in each case the rates at which heat is absorbed from the hot reservoir and discarded to the cold reservoir.

a. A carnot engine operates between heat reservoir at 750K and 300K.

b. A practical engine operates between the same heat reservoirs but with a thermal efficiency n = 0.35

*Please show are the formulas and steps how to do this problem please.

A furnace wall is constructed of an inner layer of 10 mm of material A with k_A = 20W/mK, 20 mm of material B with k_B = 1.5 W/mK, a middle layer of 30 mm of material C with k_C=3.0 W/mK) , and an outer layer of 40 mm of material D (k_D=300 W/mK) . The temperature of inside wall is 1000 K and the temperature of outer layer is 350 K. The temperature and convection coefficient of hot air inside furnace are 1100 K and 100 W/m²K, while the temperature and convection heat transfer coefficient of the ambient air outside the furnace are 300K and 25 W/m²K.

1) Calculate the heat flux transferred from the furnace through the wall to surrounding.

2)Calculate the temperature at the interface between material B and material C

3) If material B is changed to material E with k_E= 15W/mK with a thickness of 15mm.Calculate the heat loss from furnace to surrounding. Comment on the effectiveness of material B and material E.

(a) What is the total volume of gaseous products, measured at 350°C and 689 torr, when an automobile engine burns 103 g of C8H18 (a typical component of gasoline)? L (b) For part (a), the source of O2 is air, which is about 78.0% N2, 21.0% O2, and 1.0% Ar by volume. Assuming all the O2 reacts, but no N2 or Ar does, what is the total volume of gaseous exhaust?

Problem 1:

You are given two tanks. Each with a separate inlet Fin and an outflow Fout. The relation of the level of water to the flow is given with the following differential equation:

A dh/dt = Fin − Fout .

To simplify the model of the system assume that the height of water in the tank vs the water flowing in can be linearized and represented by the following:

A dh/dt = Fin − αh;

Where alpha can be assumed to be a flow coefficient for the current flow operating range chosen.

The parameters for the 2 tanks are as such: alpha1 = 2, alpha2 = 10, Area1 = 400, Area2 = 1000.

1) Derive the transfer function for each system (where the level of water [h] is the output and the flow in [Fin] is the input.

2) What is the time constant and gain of each system

3) Assume that the Fout of tank 1 is going into tank 2. i.e. Fout,1 = Fin,2. What is the transfer function of the overall system? [where the level of water in tank 2 h2 is the output and the flow into tank 1 [Fin,1] is the input.

4) The transfer function in question 3 is second order. What is the gain, damping ratio, and natural frequency of this system?

5) Plot the step response of the overall system

6) Use the ‘stepinfo’ function (read the help in matlab) and determine the rise time (in seconds) and overshoot (in %) of the overall system to a step input.

Methanol (CH3OH) is produced by reacting carbon monoxide (CO) and hydrogen (H2). A fresh feed stream containing CO and H2 joins a recycle stream and the combined stream is fed into a reactor. The reactor outlet stream flows at a rate of 350 mol/min and contains 10.6 wt% H2, 64.0 wt% CO, and 25.4 wt% CH3OH. The stream enters a cooler in which most of the methanol is condense. The liquid methanol is withdrawn as a product, and the gas stream leaving the condenser--which contains CO, H2, and 0.40 mole% uncondense CH3OH vapor is the recycle stream that combines with the fresh feed stream.

a. Draw the process flow diagram. Calculate the mole fraction of CH3OH, CO, and H2 present in the stream leaving the reactor.

b. Calculate the molar flowrate (moles/min) of condensed methanol stream and recycle stream.

c. Calculate the molar flowrate (moles/min) of CO and H2 present in the fresh feed.

d. What is the single-pass and overall conversion of CO?

For the following four data sets, your objective is to come up with an appropriate ARIMA model (seasonal or non-seasonal).

Sulfer dioxide series so2

Crude oil prices oil

Global temperature data gtemp

Johnson and Johnson earnings jj

Your answers should include the following components.

Plot of the data.

Box-Cox transformation if necessary, and the plot of the transformed data. Note that if a transformation is necessary, the transformed data must be used throughout.

Use appropriate techniques (if necessary) to remove trend and seasonal variations. Explain clearly what method(s) was used. Also submit the plot.

Plot of ACF and PACF. Explain clearly how you use them to determine a range of ARIMA model. Make sure to use differencing if necessary.

Using certain criterion, determine an optimal ARMA(p, q) model.

Using hypothesis testing methods, check if certain parameters of the ARMA model can be removed.

Performed diagnostic check for the model you obtained. Submit the appropriate plots. Make sure to use Box-Ljung statistics to test for white noise. If diagnostic check failed, adjust your model and start all over. Compare all possible models you considered with AIC values and p-values of the Box-Ljung statistics. Determine the final model.

Write the equation of the final model with clearly indicating the AR and MA coefficients. What is the estimate of the white noise variance? What does it tell you?

Forecast the next 20 values, and submit the plot showing the data with forecast values together with their prediction intervals. State the forecasting values with their standard errors.

Determine the overall heat transfer coefficient (U) in a heat exchanger that uses steam to heat water to the point of vaporization (in vacuum.) The system is non-insulated, so the heat lost to the surroundings must be taken into consideration. While I know that the heat Q = mCdT and the heat transfer rate q = UAdT(Log-mean), I am struggling to equate the two due to the heat lost to the surroundings. How do I go about determining the overall heat transfer coefficient in a system like this?

I would like to make 3.8 M of Perchloric acid and, i have no idea how to do it since it is not my field of study.

But have to make 3.8 M of Perchloric acid because we need to make sampling fluid with it.

Sampling fluid contains 0.11~0.13 grams of 2,4-DNPH+1L of Acetonitrile+0.15 mL of 3.8 M Perchloric acid.

The Perchloric acid that i have right now is 70%, 99.999% trace metals basis, Cas:7601-90-3 HCIO4, MW:100.46 g/mol, in a bottle of 50 mL.

My colleague told me that it contains 2009.2 M of HCIO4 in 50 mL from the calculation; 100.46/0.05 L = 2009.2 M HCIO4

If this it right, how do i make 2009.2 M of HCIO4 to 3.8 M HCIO4 ???

please help.

Liquid benzene at 298K and 1.2 bar is converted to vapor at 473K and 5 bar in a two-step process.
For compression to 5 bar by a pump, calculate the power requirement of the pump, if it is 70% efficient. Assume Cp of 105 j/mol.