Physical Chemistry Answers

Water flows through an 8-in steel pipe at an average velocity of 6ft/s. Downstream the pipe devides into 8inch main and 2-in-bypass. The equivalent length of the bypass is 22ft; the length of the 8in pipe in the bypassed section is 16ft. Neglecting entrance exit losses what fraction of the total water flow passes through the bypass? ( Fluid mechanics)

Show that the velocity profile is steady and laminar flow of Newtonian fluid in circular pipe is parabolic. Also prove that average velocity is half of maximum velocity of fluid. Determine kinetic energy correction factor and momentum co-reaction factor for laminar flow of a Newtonian fluid in pipeline.

Calculate the energy values of the electron in second and third orbits of hydrogen atom

Calculate the value of Kp for the equation

C(s)+CO2(g)−⇀2CO(g) Kp=?

given that at a certain temperature

C(s)+2H2O(g)−⇀CO2(g)+2H2(g) Kp1=3.69

H2(g)+CO2(g)−⇀H2O(g)+CO(g) Kp2=0.671

At a given temperature, the elementary reaction A−⇀B, in the forward direction, is first order in A with a rate constant of 0.0410s−1. The reverse reaction is first order in B and the rate constant is
0.0880s−1.

What is the value of the equilibrium constant for the reaction A−⇀B at this temperature?

What is the value of the equilibrium constant for the reaction B−⇀A at this temperature?

At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.300M and
[NO]=0.500M.

N2(g)+O2(g) −⇀ 2NO(g)

If more NO is added, bringing its concentration to 0.800M, what will the final concentration of NO be after equilibrium is re‑established?

An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has partial pressures of 217.0 Torr, 13.2 Torr, and 13.2 Torr, respectively. A quantity of Cl2(g) is injected into the mixture, and the total pressure jumps to 263.0 Torr at the moment of mixing. The system then re-equilibrates.

The chemical equation for this reaction is
PCl3(g)+Cl2(g) −⇀ PCl5(g)

Calculate the new partial pressures, P, after equilibrium is reestablished.

The reaction of carbon monoxide and diiodine pentoxide as represented by the equation: I2(g) + 5CO2(g) 5CO(g) +
I2O5(g) is exothermic. The yield could be increased by:

A 2m long pipelines tapers uniformly form 10cm diameter to 20cm diameters at its upper end. The pipe centreline slopes upwards at a angle of 30° to the horizontal and the flow direction is from smaller to bigger cross section. If the pressure gauges installed at lower and upper ends of the pipeline read 200kpa and 230kpa respectively. Determine the flow rate and the pressure mid length of the pipeline. Assume no energy losses.

Prove that for single reaction stoichiometry and for multi reaction stoichiometry.