1. A voltaic cell based on the reaction below has an E^°_cell of +0.30 V.

2Cr(s) + 3Fe²⁺(aq) à 2Cr³⁺(aq) + 3Fe(s)

1. What is the E_cell at 264 K when [Cr³⁺] = 1.41 x 10^-2 and [Fe²⁺] = 1.26 x 10^-2
2. What is ΔG under these conditions? ΔG° = -135 kJ  

Use Lee Kesler Correlation and Abbott Correlation to calculate Z and molar volume v for SF6 at 75oC and 30 bar. Compare the results from the two different correlations and comments

A spherical tank of diameter of 10 meters contains liquid toluene at 1 atmosphere at 25 oC. An initially filled tank is drained from the bottom such that the liquid level drops to half. As we drain the tank, toluene vaporizes. The enthalpy of vaporization of toluene at its normal boiling point, Tn =383.8 K, is 33.74 kJ/mol. Calculate the number of moles toluene evaporated from liquid to vapor phase. If the draining is isothermal, calculate the amount of heat provided by the atmosphere to the toluene in the tank.

A 5.87 %w/v solution (5.87g per 100.0 mL) of starch in water was found to have an osmotic pressure of 88.9 mmHg at 317.1 kelvin. Calculate the average molar mass of the starch used, taking 1.00 atm = 760.0 mmHg. The value of the gas constant, R , is 0.0821 L atm K^-1mol^-1. Present your answer in 3 signficant figures

Consider an incompressible flow in cylindrical coordinates with velocity field v = Cr^(a) θ^ where C is a constant (a) Show that the flow satisfies the Navier-Stokes equations for only two values of a. (b) Given that p(r; θ; z) = p(r) only, and neglecting gravity, find the pressure distribution for each case, assuming that the pressure at r = R is p0

4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kg of HFC-134a as the working fluid.
Identify the compressor. condenser. throttle and the evaporator stages of the cycle and indicate
where heat Qc, is extracted from the cold refrigerator and where. Qa is released to the
environment. Also indicate where the refrigerant is in liquid. gas. or a mixed phase.

(b) Show that the COP = Qc(Qh -Qc) can be expressed in terms of the enthalpies at three points of the
cycle, explaining all steps of the derivation.

Unit V Essay Please write an essay about pollution prevention in the dry cleaning and hydraulic fracturing industries. Include the following items: 1. one-paragraph introduction; 2. five-paragraph review of the Sinshelmer, Grout, Namkoong, Gottlieb, and Latif (2007) dry cleaning article, including an explanation of the common dry cleaning process using perchloroethylene (PCE), problems with PCE, and a review of options to PCE presented in the paper; 3. five-paragraph review (total—not five paragraphs for each article) of the Heywood (2012) article and the Chen, AlWadei, Kennedy, and Terry (2014) article on hydraulic fracturing, including environmental issues with hydraulic fracturing and the P2 solutions presented in each of the two articles (include the use of liquid carbon dioxide); 4. five-paragraph review of the Taylor, Carbonell, and Desimone (2010) article on using liquid carbon dioxide for P2, focusing on how liquid carbon dioxide can be used as a substitute in the dry cleaning industry and in the hydraulic fracturing industry; and a 5. two-paragraph summary to include your overall thoughts about P2 in the dry cleaning and hydraulic fracturing industries, and specifically whether liquid carbon dioxide is a reasonable, cost-effective, and environmentallyfriendly alternative to traditional methods. In order to access the resources below, you must first log into the myCSU Student Portal and access the Academic Search Complete database within the CSU Online Library. Use at least the following references: Chen, J., Al-Wadei, M. H., Kennedy, C. M., & Terry, P. D. (2014). Hydraulic fracturing: Paving the way for a sustainable future? Journal of Environmental and Public Health, 1-10. Heywood, P. (2012, April). Fracking safer and greener? TCE: The Chemical Engineer, 850, 42-45. MEE 6201, Advanced Pollution Prevention 5 Sinshelmer, P., Grout, C., Namkoong, A., Gottlieb, R., & Latif, A. (2007). The viability of professional wet cleaning as a pollution prevention alternative to perchloroethylene dry cleaning. Air and Waste Management Association, 57, 172-178. Taylor, D. K., Carbonell, R., & Desimone, J. M. (2010). Opportunities for pollution prevention and energy efficiency enabled by the carbon dioxide technology platform. Annual Review of Energy and the Environment, 25(1), 115-148.

1) From the following particulars, calculate:

(a) P / V Ratio

(b) Profit when sales are OMR. 40,000, and

(c) New break-even point if selling price is reduced by 10%

Fixed cost = OMR. 8,000

Break-even point = OMR. 20,000

Variable cost = OMR. 60 per unit

2)Fixed cost  OMR. 8,000

Profit earned  OMR. 2,000

Break-even sales   OMR. 40,000

What is the actual sales?

3)

You are given the following data:

Fixed expenses OMR. 4,000

Break-even point OMR. 10,000

Calculate--

(i) PV ratio

(ii) Profit when sales are OMR. 20,000

(iii) New break-even point if selling price is reduced by 20%

4)

Given the following information:

Units of output   500,000

Fixed cost  OMR. 750,000

Variable cost per unit  OMR. 2

Selling price per unit  OMR. 5

  You are required to determine:

(i) The break-even point

(ii) The sales needed for a profit of OMR. 6,00,000 and

(iii) The profit if 400,000 units are sold at OMR. 6 per unit

A stick of length L moves past you, parallel to its length, at speed v. Let your frame be S, and the stick's frame be S'. Call the event when the front of the stick passes you Event A, and the event when the back of the stick passes you Event B.

Draw the Minkowski diagram to scale, including both frames, and putting in both events.

Answer the following questions:

1. An object with mass M and velocity V has kinetic energy K= 1/2MV^2. If the velocity of the object is reduced to 1/5V, then its new kinetic energy is: a)1/5K b) 5K c)1/25K d) 25K

2. Velocity is a vector, therefore it has magnitude and direction. In a circular motion, the change in magnitude and direction of velocity respectively produce: a) centripetal acceleration and tangential acceleration b) tangential acceleration and centripetal acceleration c) tangential force and centripetal force d) centripetal force and tangential force

3. By the work and energy theorem, work is equal to the change in kinetic energy. If the unit of energy is Joule, then the unit (s) of work is (are): a) Kg x m/s^2 b) N/m c) N x m d) N

4.If two spheres of masses M subscript 1 and M subscript 2 move in opposite directions, one to the right and the other to the left. After the crash: a) the sphere of mass M subscript 1 remains at rest. b) the sphere of mass M subscript 2 remains at rest. c) the two spheres continue to move in one direction d) cannot be determined

5. A particle of mass M and velocity V has a kinetic energy K. If the energy of the particle changes to 25 K, then the velocity of the particle changes to: a) 25V b) 1/5V c) 5V d) 10V