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A particular reaction has a DH value of -114 kJ and DS of -296 J/mol K at 298 K. Assuming that DH and DS hardly change with temperatur, determine the temperature in C at which the spontaneity of this reaction changes.
If the solution has the same density and specific heat as water, what is ?H for this reaction (per mole of H2O produced)? Assume that the total volume is the sum of the individual volumes.
A 2.50-g sample of a large biomolecule was dissolved in 37.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
To the alchemists, gold was the material representation of purity. It is a very soft metal that can be hammered into extremely thin sheets. If a 1.07 g piece of gold is hammered into a sheet whose area is 30.0 ft2,
The iron content of hemoglobin can be determined by converting the iron to Fe2+ and titrating using MnO4 -. A 5.0 g sample of hemoglobin requires 21.6 mL of 0.00310 M potassium permanganate. What is the percent of iron in the hemoglobin sample?
Calculate delta S for the heating of 1 mole of SO2(g) from 75°C to 1350°C at a constant pressure of 1 bar.
how many grams of silver nitrate are present when 8.50 g of silver are in a sample?
A graduated cylinder contains 155 mL of water. A 15.0 g piece of iron (density = 7.86 ) and a 20.0 g piece of lead are added. What is the new water level in the cylinder?
What is the molecular weight of a volatile liquid, if .50 g of the liquid fills a 100 mL flask as a gas at 25 degrees C and 1.0 atm pressure
the discharge pressure is 2 bars. Determine the area, enthalpy and specific volume at the entrance of the nozzle and the area, enthalpy
A student measures the conductivity of an Fe2(SO4)3 solution and determines it to be a strong electrolyte. The student incorrectly lists the species in solution as O-2, S-2, Fe+3. Give the correct list of species in the solution.
The pressure on 200 ml of oxygen gas changes from 380 mm hg to 760 mm hg. The temperature does not change. What is the new volume of the oxygen gas?
A cylinder contains a mixture of hydrogen and chlorine molecules. Compare without doing any calculations
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