What effect will methanol have on the rate of reaction of sodium phenoxide with ethyl iodide? is this a good solvent for this type of mechanism? why do you think this solvent is used

Gasoline is used n internal combustion engines.Given composition by weight (octane 22,heptane 35,benzene 28,ethanol 10,MTBE 5). MW(Octane 114.23,heptane 100.21,benzene 78.11,ethanol 46.07,MTBE 88.15).Litre of fuel used:2000 litres(annually) (200km for 5 working days).Average density of gasoline=0.75kg/L

Assuming ideal gas behaviour for the exhaust gases,calculate the volumetric flow rate of exhaust gas for a trip (11.1km) on a given day?Assume 30% excess air intake.

What factor does not affect the distribution of different isozymes?

Select one:

a. Different metabolic patterns in different organs.

b. Different locations and metabolic roles for isozymes in the same cell.

c. Different stages of development in embryonic or fetal tissues and in adult tissues. 

d. Different catabolic abilities using commonly evolved amino acid sequences

e. Different responses of isozymes to allosteric regulation

By means of a dimensional analysis, verifies that the dimensionless numbers corresponding to mass, energy and moment have no dimensions.

• A mixture of 92 kg of ZrO2 with 8 kg of CaO is melted into a liquid at high temperature.
• a) On slow cooling, at what temperature will solid first appear?
• b) What is the composition of this solid?
• c) At what temperature will the sample become completely solid?
• c) As the sample continues to cool, at what temperature will a second solid phase begin to precipitate?
• d) What is the composition of this solid phase?
• e) What is the expected composition and relative amounts of the phases expected to be present at room temperature?

• A mixture of 92 kg of ZrO2 with 8 kg of CaO is melted into a liquid at high temperature.
• a) On slow cooling, at what temperature will solid first appear?
• b) What is the composition of this solid?
• c) At what temperature will the sample become completely solid?
• c) As the sample continues to cool, at what temperature will a second solid phase begin to precipitate?
• d) What is the composition of this solid phase?
• e) What is the expected composition and relative amounts of the phases expected to be present at room temperature?

Flue gas from a methane combustor is at 1400 K and 1 bar pressure for stoichiometric combustion with air. Estimate the radiant heat transfer to the walls of a 0.50-m square duct maintained at 700 K. Assume the walls are black. Repeat the calculation for an excess air ratio of 2.

An R-134 heat pump system obtains heat from a geothermal source and transfers 90,000 Btu/hr to an office building for space heating. The refrigeration cycle operates at pressure limits of 50 and 120 psia. If the compressor efficiency is 75%, find the power input (in hp and in Watts). (b) Find the COP for this heating application. If the building used electrical resistive heating rather than a heat pump, how much electrical power (in W) would be required? What is the percent increase in electrical power required (above that required by the heat pump) for the case of electrical resistive heating? (c) If the cycle operates 16 hrs/day and 30 days/month during the winter, and electricity costs 12 cents/kWH, how much money is saved per month by using the heat pump? (d) What are the working fluid temperatures in the two heat exchangers ? (For the condenser, we are mostly interested in the working fluid temperature during condensation because that is where most of the heat transfer occurs.)

Calculate the total theoretical oxygen demand (mg/L) of a solution containing 750 mg/L of C5H7O2N. Also, calculate Carbonaceous ThOD and Nitrogenous ThOD separately

1. What kinds of bonds would be expected in polymeric materials?

2. State the difference between:
a) Linear and branched polymers.
b) Thermosetting and thermoplastic polymers.

A distillation column with a partial reboiler and a total condenser is being used to separate a mixture of benzene, toluene, and cumene. The feed is 40 mol% benzene, 30 mol% toluene and 30 mol% cumene. The feed is input as a saturated vapor. We desire 99% recovery of the toluene in the bottoms and 98% recovery of the benzene in the distillate. The reflux is returned as a saturated liquid, and CMO can be assumed. Equilibrium can be represented as constant relative volatilities. Choosing toluene as the reference component, ?benzene-toluene = 2.25 and ?cumene-toluene = 0.210. Use the Fenske equation to find the number of equilibrium stages required at total reflux and the recovery fraction of cumene in the bottoms. b. For the distillation problem given in part a, find the minimum reflux ratio by use of the Underwood equations. Use a basis of 100 moles of feed/h. Clearly state your assumptions. d. For L/D = 1.25(L/D)min , find the total number of equilibrium stages required for the distillation problem presented in parts a and b. Use the Gilliland correlation. Estimate the optimum feed plate location.

Questions relative to thermochem

a) I have steam at 400 degrees at 1 MPa flowing in a pipe. How much heat per kilogram would I have to remove to condense it into saturated liquid at 1 MPa?

b) I have 10kg of steam with an enthalpy of 2600kj/kg at 500 Kpa, what is the temperature of the steam? How much volume will the steam occupy?

I am confused about the steam state in question a), is that supposed to be superheated steam?

And how can I calculate those two Qs.

Cheers.