For a kerosene drop with an initial diameter of 1 mm in air at 700°C and 1 atm absolute pressure, (a) find the time to vaporize 50%, 90% and 100% of initial mass of the droplet, and (b) what is the mass flow rate from the droplet when the droplet is 50% and 90% vaporized?

A 1.000-L vessel contains a mixture of hydrogen, carbon monoxide and methane gases in unknown proportions at 20.9-bar and 25 °C. The gaseous mixture is found to have a mass of 13.10-g and a higher heating value of 414.10 kJ/mol. What is the composition of the gas?

y_H2=   

y_CO=

y_CH4= .2

In this experiment, we will explore fermentation. As you read Chapter 13, one of the fates of pyruvic acid can be the production of carbon dioxide and ethanol. The pyruvic acid is made from carbohydrate by glycolysis. By measuring the amount of CO2 made over time, you can measure the efficiency of glycolysis. The basic experiment is relatively simple. 1. Prepare a sample of carbohydrate in water. Take note of the concentration in % (use volume or weight). 2. Completely fill a small juice glass with the carbohydrate mixture. 3. Add yeast to the mixture. Start with 1.4 tsp. 4. Mix the carbohydrate, water, yeast mixture. If you spill some make sure the juice glass is filled to the brim. 5. Place a flat-bottom bowl over the juice glass. 6. Invert both the bowl and juice glass together, being careful not to spill the contents. Now the glass is upside down in the bowl. 7. Watch the glass for at least 2 hours, recording the size of the bubble formed every 15 minutes. The size of the bubble can be estimated by measuring the height of the bubble in cm. Multiply the height by (1/4)x(diameter in cm)x(diameter in cm) x pi. Pi is approximate 3.14. (V= h x pi x r^2). Run this experiment 4 times (Since there is a lot of waiting, you can start a second experiment after you get the first started). One experiment should be a control, using no carbohydrate. Vary only one variable. For example, one student might test sucrose (table sugar), Karo syrup, and honey. Another student might vary the concentration of carbohydrate; 5%, 10%, 15%. Another student might vary the temperature: in an ice bath, room temp, in a 100 degree F oven. This is a case where I would like to see you design your own experiment. Make a lab report of your own design. It should have the following components:

1. Introduction and Objectives.

2. Procedure (What did you do?).

3. Results in tabular form.

4. Conclusion ( What do your results mean in terms of what you have learned about enzyme kinetics, glycolysis, and carbohydrate metabolism?)

The transportation sector in the United States presently runs almost exclusively on petroleum-based derivatives (gasoline, diesel, fuel). Research the following alternatives.

Hybrid

Diesel & biodiesel

Flex-fuel Ethanol

Natural gas

Propane

Hydrogen

Electric

Fuel cell

Prepare a one-page paper outlining what you believe may be viable alternatives to the use of fossil fuels. May be assigned as a team or an individual assignment.

different types of gas absorption columns- explain briefly

A stream of 70kg/hr superheated steam is used to heat 15kmol/hr nitrogen gas via a heat exchanger. The superheated steam at 350⁰C and 1 bar enters the heat exchanger and exits as saturated water liquid at the same pressure.The nitrogen gas is heated from 25^oC to 300^oC at constant pressure of 1atm.The heat exchanger is set up for countercurrent flow.

i)Draw and label the flowchart of the heat exchanger process by indicating all the input and output process variables.

ii)Determine the heat loss from the heat exchanger.

iii)If the saturated water liquid flows in a pipe with inner diameter of 2cm,estimate the rate of kinetic energy of the saturated water liquid.

iv)Propose one method to reduce heat loss.

Procedure :

Note : During the lab, look for a qualitative observation that proves CO2(g) is denser than air.

(1)Weigh the empty 400mL Erlenmeyer flask with a rubber stopper on.

(2)Obtain few small pieces of CO2(s) in the flask. The total amount should be close to the given rubber stopper in size. Let it sublime. Make sure the pieces are small enough so you can see them ‘sing’ and ‘dance’.

* Should you have your rubber stopper on or off during the sublimation? Why?

(3) When sublimation is done, cap it with the stopper and weigh it. We are assuming that the container is completely filled with CO2 at this point.

* How can you be sure that there is no air left in the flask?

            * What does this mass contain?

Can one get the repassivation potential of a stainless steel in a saline solution using the linear polarisation method (LPR)?

Explain your answer in 1-2 sentences.

For the following pairs of alloys that are coupled in seawater, predict the possibility of corrosion

Aluminum and cast iron

Inconel and nickel

Cadmium and Zinc

Low Carbon steel and copper

1. Why organic solvent is often used in liquid-liquid extraction?

2. Name the adverse effects which occur when a trayed absorption tower operates at too high and too low vapor flow rate?

3. Component separation involving two or more phases (regardless of technique) occurs because systems want to achieve equlibrium and as a result, mass transfer occurs. In a scenario where this mass transfer is particularly slow, would it be more accurate to model a system based on phase equlibrium or mass transfer? Explain.

In 1800 the main fuel used in the US was wood. (assume wood cellulose is C6H12O6). In 1900 the main fuel used was coal ( assume coal is pure Carbon) In 2014 the main fuel is oil(assume it is isooctane) Assume that oin 2100 the main fuel will be Hydrogen(H2). Use a spreadsheet to prepare a graph of carbon dioxide releasedper kilojoule of energy produced.(y axis), as a function of year (x axis) from 1850 to 2050

what would be an example model for artificial intelligence to treat pancreatic cancer ?

Pressure Steam

Vapor Compression

Heat Recovery

Reverse Osmosis

Include a sketch (2 pts each) of each system with components labeled, explanation (3 pts each) of the process, advantages and limitations (2 pts each), the typical size (1 pt each) of the shipboard plant types, current applications (1 pt each) and future trends (1 pt each)

Metallurgy question:

Reagent addition is very important to the froth flotation process. In this regard, below are several reagent(mineral)/mineral combinations. Give the expected response the reagent will have on the mineral in terms of its surface chemistry and flotation behavior. In all cases identify the reagent in terms of its appropriate flotation term (i.e. collector, activator etc.).

a.       xanthate/FeS2 (pH 10)

b.       Cu++/ZnS

c.       dextrin/coal

d.       oleate (oleic acid)/ BaSO4 pH 10

e.       dodecylamine/SiO2 pH 5

f.       dodecylamine/SiO2 pH 1.5

g.       Fe2O3 particles (1 micron diameter)/ SiO2 particles (100 micron diameter), note desire to concentrate SiO2 with dodecylamine collector, pH 5.

The reaction, C₂H₆(g) + Cl₂(g) àC₂H₅Cl (g) + HCl (g), occurs in a continuous flow reactor. 100 mol/hr of ethane and 125 mol/hr chlorine gas @ 25°C are fed to the reactor. Assume complete reaction of ethane. The reactor exit stream temperature is 200°C. Calculate the moles of each component of the feed and exit streams and the extent of reaction z. Calculate the heat released or absorbed (specify which) from the reactor using the heat of reaction method. The chloroethane heat capacity can be found in Perry's. For the C_pvalues from Table B.2 in your text, you may use just the “a” and “b” terms for simplicity.