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1. (a) Write the possible oxidation and reduction half-reactions that occur when magnesium is immersed in each of the following solutions: (i) HCl, (ii) an HCl solution containing dissolved oxygen, (iii) an HCl solution containing dissolved oxygen and, in addition, Fe2 + ions.
(b) In which of these solutions would you expect the magnesium to oxidize most rapidly? Why?
2. Demonstrate that (a) the value of f in Equation 17.19 is 96,500 C/mol, and (b) at 25°C (298 K),
(b) Write the spontaneous electrochemical reaction.
Gold has an fcc crystal structure. The cell parameter (lattice constant) is 0.408 nm. 1) Determine the distance (d-spacing) between the [311] and [111] planes; 2) Sketch the [110] direction in the unit cell and determine the linear density of gold; 3..
1. A door with rectangular shape is hinged along an axis having direction a lying in the xz place. The door is supported by a cable that has a tensile force F=100N. Determine the moment of F about line a.
question a 49 kg person drinks 520. g of milk which has a caloric value of approximately 3.0 kjg. if only 19 of the
Design a journal bearing for a centrifugal pump running at 1440 r.p.m. The diameter of the journal is 100 mm and load on each bearing is 20 KN. The factor ZN/p may be taken as 28 for centrifugal pump bearings. The bearing is running at 70 degrees Cel..
State mathematically Newtona's law of viscosity. Water moves over a flat surface. At a point on the surface the velocity gradient is 60 s-1. The viscosity of water is 0.0012 Ns/m2. Calculate the wall shear stress.
a mass of .25 kf of co2 at a termperature of 300k and pressure of 100 kpa is heated at constant pressure to a volume
a closed system consisting of 0.13 lbmol of air undergoes a polytropic process from a pressure of 14 psia and specific
a liquid food is being heated in a tubular heat exchanger. the inside pipe wall temperature is 110degc. the internal
a 2.9 kg collar is free to slide on a rough rod rotating in the horizontal plane. the collars radial position along the
Air at 300 K and a flow rate of 3 kg/h passes upward through a 30-mm tube, as shown in the sketch. A thin film of water, also at 300 K, slowly falls downward on the inner surface of the tube. Determine the convection mass transfer coefficient for ..
12. 3 kg of refrigerant 22 undergoes a process for which the pressure-specific volume relation is pv^-0.8 = constant. The initial state of the refrigerant is 12 bar and 60 degrees C. The final pressure is 8 bar. Kinetic and potential energy effects a..
show that the continutiy equation for a inviscid irrotational flow leads to leplaces eqaution in terms of the velocity
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