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Calculate the difference in molar entropy (a) between ice and liquid water at 5.00 °C, and (b) between liquid water and its vapor at 90.0 °C and 1.00 atm. The differences in molar heat capacities on melting and on vaporization are 37.3 and -41.9 J•mol ^-1 *K^-1, respectively. Distinguish between the entropy changes of the sample (system), surroundings, and the total system (universe), and discuss the spontaneity of the transitions at the two temperatures. Note that the final answers are really looking for the entropy change of the universe.
What are the spectator ions in the solution after completely precipitating an insoluble carbonate compound when mixing BaCl2(aq)
A certain technique is known to have a mean of 0.500 and standard deviation of 1.84*10^-3. itis also known that Gaussian statistics apply. How many replicate determinations are necessary if the standard error of the mean is not to exceed 0.100%
the energy carried away by one mole of potassium is 295KJmol^-1. What is the wavelength of a single photon? What is the color of this light emitted
The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm. The reaction occurs in a 1.48- cm sample cell, and the only colored species in the reaction has an extinction coefficient of..
If you added 75ml of a 0.555M solution of NaCl to enough water to produce 950 ml of solution, what would be the resulting molarity?
The atomic mass of element X is 33.42 amu. A 15.05-g sample of X combines with 79.32 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
Write an equation for the hydrogenation of glyceryl trilinolenate, a fat formed from glycerol and three linolenic acid molecules.
A particular system is doing work on the surroundings as well as gaining heat from the surroundings. What can be said about the values of q (heat) and w (work) for this system?
Cosidering the solubility of the nylon across the dirent solvents, what conclusion could be made about nylon solubility based on the structure of nylon and the structure of the solvents
Carbon disulfide, CS2, is a volatile, flammable liquid. It has a vapor pressure of 400.0 mmHg at 28.0°C and 760.0 mmHg at 46.5°C. What is the heat of vaporization of this substance?
The solubility of CaSO4 in pure water at 0oC is 1.13 gram(s) per liter. What is the value of the solubility product.
In the recrystallization procedure, an Erlenmeyer flask is commonly used during the step in which the crude is dissolved in the solvent of choice. Furthermore, if the recrystallization is slow typically the flask is closed with a cork.
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