A) Without doing any calculations (just compare the correct K_sp values) complete the following statements:

B) For each of the salts on the left, match the salts on the right that can be compared directly, using K_sp values, to estimate solubilities. If more than one answer is correct, enter the letters without delimiting characters.

Write the expression for K_sp in terms of the solubility, s, for each salt, when dissolved in water.

Note: Multiply out any number and put it first in the K_sp expression. Combine all exponents for s.

C) Determine the relative solubilities of the following magnesium compounds:

Label the scenario shown in each image with the correct types of energy. Each scenario involves at least one type of energy.

Thermal Energy, Kinetic Energy, Potential Energy, Chemical Energy, Mechanical Work.

1. The movement of gas particles

2. A ball rolling on a flat surface

3. Water held behind a dam

4. The bond between hydrogen atoms

5. Gas pushing a piston upward

There can be multiple answers for some of the scenarios. Thank you!

A manufacturer produces pistons rings for an automobile engine. It is known that the ring is approximately normally distributed and has standard deviation of s = 0.001 mm. A random sample of 15 rings has a mean diameter of ?=74.036 x ̅=74.036 mm.

(a) Using a level of significance of 0.01, state and test the hypothesis that the mean piston ring diameter is 74.035 mm.

(b) What is the minimum level of significance to reject the null hypothesis?

c) Use the appropiate confidence interval to test the hypothesis and draw conclusions

Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 K to 8 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible. Determine the amount of entropy produced, in kJ/K per kg of air, for the compression. What is the minimum theoretical work input, in kJ per kg of air, for an adiabatic compression from the given initial state to a final pressure of 8 bar? Note that work is positive into the compressor.

Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 K to 4 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible. Determine the amount of entropy produced, in kJ/K per kg of air, for the compression. What is the minimum theoretical work input, in kJ per kg of air, for an adiabatic compression from the given initial state to a final pressure of 4 bar? Note that work is positive into the compressor.

Two moles of gas are confined in a piston–cylinder device. Initially, the temperature is at 300 K and the pressure is 1 bar. The gas is compressed isothermally to 5 bar. If the ideal gas heat capacity is C ig P = 7R/2, find Q, W, ?U, ?H, and ?S if:

(a) the gas is ideal, or

(b) the gas satisfies the van der Waals equation of state with a = 5.0 × 106 bar · cm6/mol2 and b = 30 cm3/mol.

(c) Comment on the differences

0.5 Kg of air at t1 = 327 ⁰C and the specific volume v1 = 0.2 m³/Kg is enclosed in a cylinder under a piston. The gas slowly expands with no friction to the temperature t2 = 0 ⁰C and the specific volume v2 =0.65 m³/Kg (polytrophic process). Find the work and heat of the process and change in internal energy of gas. Determine the initial and final pressure of the gas. The isentropic exponent and particular gas constant for air are equal to k=1.4 and R=287 J/KgK, respectively.

Propane vapor initially at 7.0 bar and 50C (State 1) is contained within a piston-cylinder device. The refrigerant is cooled at constant volume until its temperature reaches -10C (State 2) and is then compressed isothermally to a pressure of 6.0 bar (State 3). (a) Locate the state points on appropriately labeled p-v diagram. (b) Determine the specific volume (in m3 /kg), internal energy (in kJ/kg) and enthalpy (in kJ/kg) at each state point.

A system containing 2 moles of CO 2 (g) is initially at 25 0 C and 10atm and is confined to a cylinder that has a cross section of 10 cm 2 . The system expands adiabatically against an external pressure of 1 atm until the piston has moved upwards through 20cm. Assume that CO 2 is an ideal gas with C v,m = 28.8 J/K mol. Calculate q, w, Δ U, Δ T and Δ S.

A cylindrical glass beaker of height 1.272 m rests on a table. The bottom half of the beaker is filled with a gas, and the top half is filled with liquid mercury that is exposed to the atmosphere. The gas and mercury do not mix because they are separated by a frictionless, movable piston of negligible mass and thickness. The initial temperature is 276 K. The temperature is increased until a value is reached when one-half of the mercury has spilled out. Ignore the thermal expansion of the glass and mercury, and find this temperature in kelvins.