1. Describe the effect of composition and temperature on the
equilibrium structure of aluminum alloys containing up to 8%
copper?
2. Explain the precipitation hardening of aluminum copper alloys
by reference to the heat treatment cycles.
3. Compare the mechanical properties of aluminum 4% copper alloy in
the as – cast, solution treated, quenched, quenched and aged and
over aged conditions.
Introduction: In this experiment, the following equilibrium system will be observed:
Fe+3(aq) + SCN-(aq) ↔ Fe(SCN)+2(aq)
The reactants are both colorless solutions (the ferric ion is slightly colored, but it is treated with nitric acid to remove the color) while the product has a reddish color. The intensity of the color that is produced is directly proportional to its concentration. If a light source is allowed to shine through such a solution, it is found that the amount of...
How would one find the equilibrium constant of the solution if
the absorbency is 0.389 and the initial concentrations are .1M and
1E-4M for two reactants?
Consider the following endothermic equilibrium system in a
closed container. In which direction will the equilibrium shift
with each of the disturbances listed below? HCO3-(s) + HC2H3O2 (aq)
↔ C2H3O2-(aq) + H2O (aq) + CO2 (g)
a. adding CO2 (g) .
b. adding NaOH (aq) .
c. adding H+ (aq) .
d. placing it in an ice bath.
e. opening the container.
(a) Find the equilibrium solution, or critical point, of the
given system.
(b) Use a computer to draw a direction field and phase portrait
centered at the critical point.
(c) Describe how solutions of the system behave in the vicinity
of the critical point.
x′ =−0.25x−0.75y+8, y′ =0.5x+y−11.5
(d) Let x= xc+u and y= yc+v, where
xc and yc give the critical point you found
in (a). Plug these into the system and show that you obtain a
homogeneous system...
Describe the structure of the Federal Reserve System and
why it is so important for the stability of the United States’
economy.
What is the difference between a commercial and an
investment bank?
List and briefly explain the 3 functions of the Federal
Reserve System.
How does the Fed perform its functions? (i.e. what are
the three policy tools that the Fed uses?) Explain each
briefly.
If the Fed would like to LOWER the interest rate, what
three actions could...
What would be the appropriate equilibrium temperature of a
system obtained by adding 25.0 g of ice at 0°C to 250.0 mL of "hot"
(80°C) coffee, assuming that the heat capacity and density of the
coffee are the same as for pure water (4.18 J g-1 °C-1 and 0.997 g
mL-1), and also assuming negligible heat transfer with the
surroundings? [For water, ΔHfusion = 6.02 kJ/mol.]
*Note: the answer is 65 deg C