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The following data compare the standard enthalpies and free energies of formation of some crystalline ionic substances and aqueous solutions of the substances:
(a) Write the formation reaction for AgNO3(s). Based on this reaction, do you expect the entropy of the system to increase or decrease upon the formation of AgNO3(s)?
(b) Use ?H°f and ?G°f of AgNO3(s) to determine the entropy change upon formation of the substance. Is your answer consistent with your reasoning in part (a)?
(c) Is dissolving AgNO3 in water an exothermic or endothermic process? What about dissolving MgSO4 in water?
(d) For both AgNO3 and MgSO4, use the data to calculate the entropy change when the solid is dissolved in water. (e) Discuss the results from part (d) with reference to material presented in this chapter and in the "A Closer Look" box on page 540.
Using the information (A 7.0 x 10 ^-3 aqueous solution of Ca(OH)2 at 25.0 degrees C has a PH of?) At equilibrium, what is the molarity of H3O+ in a 0.010 M solution of HClO
The mass density of the resulting solution was 1040 kg/m^3. Calculate themolarity and molarity of sucrose in the solution.
30. According to kinetic-molecular theory, in which of the following gases will the root-mean-square speed of the molecules be the highest at 200 °C?
Commensurate with the quantities of chemicals involved. Choose a distillation flask, which will be approximately half filled by the quantity of liquid you have to distil
If 250 ml of H2SO4 of unknown concentration with a methyl orange indicator present is titrated with [0.345 M] NaOH, the red solution turns yellow after 20.4 ml of the NaOH is added. What is the molarity of the H2SO4 solution
One synthetic preparation of aniline involves reducing nitro benzene with iron and HCL, and then steam distilling the resultant aniline at 99 degrees Celsius. How much aniline codistills with each gram of water during the steam distillation.
What mss of hemoglobin will be required to prepare a 150 nM, 10.0ml aqueous solution. (MW of Hemoglobin is 64KD)
A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. What is the new pressure when the temperature is changed to 336 K and the volume is decreased to 450. milliliters?
Compute the amounts of Cu and Br2 produced in 4.50h at inert electrodes in a solution of CuBr2 by a current of 3.80 A
considering the given equation cah2s 2h2ol caoh2aq 2h2g determine how many grams of cah2 are required to generate 145
Find the flux, J, of oil droplets through the water to the top surface. The sink is 18 cm deep, and the concentration of oil on the plate is 0.1 mol/cm3. Assume that there is no oil at the top of the sink when you start. The diffusion coefficient ..
Calculate the change in entropy of the copper, taking C(p,m) = 24.4 J/K /mol. The experiment is then repeated with the copper immersed in a stream of water that maintains its temperature at 293 K. Calculate the change in entropy of the copper and ..
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