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According to the Sackur-Tetrode equation, the entropy of a monatomic ideal gas can become negative when its temperature (and hence its energy) is sufficiently low. Of course this is absurd, so the Sackur-Tetrode equation must be invalid at very low temperatures. Suppose you start with a sample of helium at room temperature and atmospheric pressure, then lower the temperature holding the density fixed. Pretend that the helium remains a gas and does not liquefy. Below what temperature would the Sackur-Tetrode equation predict that S is negative?
Use the information given to calculate the enthalpy of formation of 3-Pentanol. a. +1204 kJmol-1 b. +2637 kJmol-1 c. -7000 kJmol-1 d. -372 kJmol-1
Calculate the Calorimeter Constant if 25 g of water at 53C was added to 25 g of water at 25C with a resulting temperature of 35C?
Calculate the CO3- concentration of a 5.45 x 10-4 M H2CO3 (carbonic acid) solution. Ka1 and Ka2 of carbonic acid are 4.3 x 10-7 and 4.8 x 10-11 respectively.
It is used to control the ph and provide nutrients in the biological (microbial) treatment of municipal wastewater streams. Calculate the ratio of solubility of Mg(OH)2 dissolved in pure H20 to Mg(OH)2 dissolved in a 0.200 M NaOH solution?
How does plaque harm teeth? Explain in detail? How does fluoride promote dental health?
A gas mixture contains helium and oxygen at partial pressures of 255 torr and 0.450 atm. what is the total pressure, in mmHg, of the mixture after it is placed in a container on-half the volume of the original container
Denoting the initial, unknown concentration CD2+, write an equation to calculate the final concentration , CD2+ considering the dilution factor, units are ppm.
If a sample of oxygen that occupies 1.00 x10^6 mL at 575 mmHg is subjected to a pressure of 1.25 atm, what is the final volume of the the sample?
How many moles of H3O+ must be added to 482 mL of a solution to adjust the pH from 8.80 to 5.56? Use E notation and 3 significant figures.
Describe the various strategies for the excretion of nitrogenous wastes employed in higher animals (chordates), both human and non-human
hydrazine n2h4 has pkb16.07 and pkb215.05. draw a structural formula for hydrazine and write the two equations
A vessel containing saturated vapor steam at 175 C is cooled to 40 C. The total mass of its contents is 450g. Determine the final volume of liquid water in the vessel.
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