a)

Consider the following reaction at 298K.
2 Cu²⁺(aq) + Hg (l) ------>2 Cu⁺(aq) + Hg²⁺(aq)
Which of the following statements are correct?
Choose all that apply.

n = 1 mol electron

The reaction is product-favored.

delta G^o < 0

E^o_cell < 0

K < 1

b)

Consider the following reaction at 298K.
3 Hg²⁺(aq) + 2 Cr (s) ------> 3 Hg (l) + 2 Cr³⁺(aq)
Which of the following statements are correct?
Choose all that apply.

K > 1

n = 2 mol electrons

The reaction is reactant-favored.

E^o_cell > 0

delta G^o > 0

c)

What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the H₂ pressure is 6.47×10^-3 atm, the H⁺ concentration is 1.43M, and the Co²⁺ concentration is 5.94×10^-4M ?
2H⁺(aq) + Co(s)------> H₂(g) + Co²⁺(aq)
Answer: ? V
The cell reaction as written above is spontaneous for the concentrations given.. t/f

d)

When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?
Pb²⁺+  Cu⁺ ----->  Pb +  Cu²⁺
Water appears in the balanced equation as a  (reactant, product, neither) with a coefficient of ?. (Enter 0 for neither.)
How many electrons are transferred in this reaction?

43 lb. moles of CO2, 6 lb. moles of water vapor and 195 lb. moles of N2 and 10 lb. moles of oxygen flow from a stack at 121 C. What is the partial pressure of water vapor in the flue gas in mm Hg.

In a combustion device, a mixture of 82 lbs of butane and 212 lbs propane C3H8 are burned with just enough air for complete combustion. How many lbs of total combustion products are formed? Round your answer to the nearest whole number

4a. Explain which biosafety cabinet is most suitable for a procedure that involves animal cells and flammable solvents.

b. A vessel disinfection procedure must be modified to sterilize the vessel. What types of changes in the procedure might be proposed?

c. Explain why TLV-TWA values cannot be used as a measure of relative toxicity of chemicals. 4d. Explain why maintaining a work environment at chemical concentrations below the TLV-TWA does not guarantee prevention of any adverse health effects for workers.

How is a low voltage two stage electrostatic precipitator different from a high voltage single stage electrostatic precipitator? Explain the operation of a plate type electrostatic precipitator. Include a schematic view of the electrostatic precipitator and mention the size-efficiency relationship.

a) Estimate the ϕ and f (bar) by the Peng/Robinson equation of state for Nitrogen at 250 K and 80 bar.

b) Compare the results in question (a) with values obtained from a "suitable" generalized correlation.

Liver paste for sandwiches. Chubby liver sausages (assume cylindrical, 5 cm across, 10 cm long), originally at 20 C, are to be processed in an autoclave kept at 115 C, and we want every part of the sausage to reach 105 C. Estimate the lowest temperature of the sausage after 3 h in the autoclave. Data: For food products containing a water fraction x, we have the following estimates: Cp= 4184x + 800(1-x) , J=kg K k = 0.56x + 0.25(1- x) , W=m K Liver sausage has about the same water content as canned dog food or 73 %; its density is about 1,050 kg/m3, and in the autoclave, h=7.6W/m2 K.

Water flow steadily from a large closed tank. The deflection in mercury manometer is 1 inches or ( 0.0254-m) and viscous effects are negligible.

1). If the tank of water is maintained at 8.50 c(celsius) and the ambient air temperature is 34 c (celsius), determine the volume flow rate in (m^3/s) leaving the 3-inch or (0.0762-m) diameter outlet from the tank, the pressure differential (delta P) between the pitot tube entrance (across from the discharge outlet) & the fluid pressure in the 1-ft or (0.3048-m) diameter discharge chamber in (kpa), and the gauge pressure of the air in (kpag) in the space above the water in the tank

2). A nozzle with a throat diameter of 3.850-mm is placed on the tank discharge to slow down the outlet flow velocity to 11 nanoliters/minute (nL/min) with a nozzle exit pressure of 3.4 kpa, determine the new pressure above the tank water in (kpa) and the new mass flow rate in (kg/s) of the water.

3). For part 2, estimate the new mercury deflection for the pressure differential (delta P) between the pitot tube entrance (across from the discharge outlet) & the fluid pressure in the 1-ft or (0.3048-m) diameter discharge chamber in (kpa)

Instead of assuming that the volume of a condensed phase is constant when pressure is applied, assume only that the compressibility is constant.

1. Show that when the pressure is changed isothermally by ΔP, G changes to

G'=G+VmΔP(1-12κTΔP)

2. Assess the error in assuming that a solid is incompressible by applying this expression to the compression of copper when ΔP = 500 atm. (For copper at 25℃, κT = 0.8*10^-6 atm^-1 and ρ = 8.93 g/cm³.)

The gas that comes out of a gasoline stabilizer has the following composition by volume: C₃H₈ 8%, CH₄ 78%, C₂H₆ 10%, and C₄H₁₀ 4%. This gas that comes out at 90 ° F and 16 psi of absolute pressure is supplied at the rate of 70,000 ft³ / h to a gas conversion plant, where the following reactions take place:

CnH2n + 2 + n H2O n CO + (2n + 1) H2

CO + H2O CO2 + H2.

CnH2n + 2 gases are converted to 95% and 90% of CO that also reacts, depending on the reactions. Make a process diagram and calculate:

a) Average molecular weight of the gas coming out of stabilizer.

b) Weight of the gas supplied to the conversion plant in lb / h.

c) Weight of the H2 that leaves the converter plate in lb / h.

d) Composition in volume of the gases that leave the converter plant.

Thank you!

A grounwate has been contaminated with carbon tetrachloride at a level of 250 ppm (by mass). Assuming equilibrium with the air in the soil right above the groundwater table, calculate the concentration of carbon tetrachloride in the air space. Give your answer in ppm (by volume). The Henry's Law constant for carbon tetrachloride is 3.0 kPa/ (gmol/m^3) and the total air pressure in the soild is 1,013 kPa.

3) Respond the following:

a)Describe a Schottky Defect in Li2O

b)Describe a Frenkel Defect in NiO

c)How would you expect the number of vacancies per unit volume to change in a metal as the temperature increases?

d)Explain why the strength of a simple thermoplastic polymer, such as a polyvinyl chloride, is expected to be very low compared to a thermoset polymer.

e) Would it be easier to crystalize polytetrafluoroethylene (teflon) (C2F4) or polystyrene (C8H8)? Why?

A distillation column receives a feed that is 40 mole % n-pentane and 60 mole % n-hexane. The feed is saturated liquid at 2,500 lbmol/hr. The column is at 1 atm. A distillate that is 97 mole % n-pentane is desired. A total condenser is used. The reflux is a saturated liquid. The external reflux ratio is L₀/D = 3. The bottoms from the partial reboiler is 2 mole % n-pentane. Determine the intersection (x_q, y_q) of the q-line with the operating line, the number of equilibrium trays, and the minimum reflux ratio.

Data: Vapor pressure, P^sat, ln P^sat = A ? B/(T + C), where P^sat is in kPa and T is in K.

n-pentane: A = 13.9778, B = 2554.6, C = ?36.2529

n-hexane: A = 14.0568, B = 2825.42, C = ?42.7089

3. Briefly describe and list the steps involved in Lean Continuous Improvement methodology.