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(a) The IR spectrum of gaseous N2O shows three strong absorption bands at 2224 cm-1, 1285 cm-1, and 2089 cm-1. In addition two quite weak bands are observed at 2563 cm-1 and 2798 cm-1 It is known that N2O is a linear molecule, but assume it is not known whether the structure is N-N-O or N-O-N. Use the IR data to decide between the two structures. What vibrations can be assigned to the strong absorption bands? What are possible causes of the weak absorptions?
(b) The IR spectrum of HCN shows three strong absorption bands at 3312 cm-1, 2089 cm-1, and 712 cm-1 From this information alone, can you deduce whether HCN is linear or nonlinear? Assuming that HCN is linear, assign vibrations to the three absorption bands.
(c) How many fundamental vibrational modes are expected for BF3? Which of these are expected to be IR active? Why? Sketch the vibrations.
(d) How many fundamental vibrational modes would you predict for (1) methane, (2) benzene, (3) toluene, (4) ethylene, and (5) carbon tetrachloride?
If one third of this energy goes into heat and other forms of internal energy of the motor, with the rest going to the motor output, how much angular speed is required to run this motor when 0.382 Nm torque is applied.
assuming a constant concentration gradient and constant number of atoms at the surface calculate the approximate
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A closed, rigid tank fitted with a paddle wheel contains 0.1kgof air, initially at 300 K, 0.1MPa. The paddle wheel stirs the air for 20 minutes, with the power input varying with time according to W = -10t, where W is in watts and t is time, in minut..
A compressor is employed to compress gas flowing steadily through it. The gas enters the compressor at a temperature of 16°C, a pressure of 100 kPa, and with an enthalpy of 391.2 kJ/kg. The gas leaves the compressor at a temperature of 245°C, a press..
Determine the cutting force F applied by the blade DE to the bar at G in terms of the force P applied to the handle of the heavy-duty cutter. Assume that the cutting force F is perpendicular to the lower edge of the blade DE.
Show by means of a drawing what happens if the charge ismoved from the center plane toward the upper plane so that it is at a distance b from the upper plane and a distance c from the lower plane while the radial distance is maintained (point B).
A large oil reservoir has a pipe of 4 in ID and 7000-ft length connected to it. The free surface of oil (kinematic viscosity = 1 x 10^4 ft2/s) in reservoir is 10 ft above the centerline of the pipe and can be assumed to remain at this fixed elevation..
a large plate contains a central crack of length 2 mm and is subjected to a cyclic stress normal to the crack which
design a stationary steam power plant operating on an ideal closed loop rankine cycle that can deliver 85 mw of net
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