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An adiabatic piston-cylinder device initially contains 1L of air at 10 atm and 25°C. Consider the expansion of air to a final pressure of 1 atm using two different paths. Path 1: reversible expansion. Path 2: isobaric expansion (the gas is expanded from Vi to Vf at a constant pressure). Assume Cvm= 3/2R for air.
a) Knowing that air contains 21% O2 and 79% N2 by volume, calculate the initial partial pressures of O2 and N2.
b) Does the relation T2/T1 = (V2/V1)-(R/Cv,m) apply to path 2?
c) Calculate the final temperature and work for path 1.
d) Calculate the final temperature and work for path 2.
A solution is prepared by dissolving 21.9 NaOH in 116.0 water. The NaOH solution has a density of 1.15g/mL. What is the % mm concentration of the NaOh solution What is the molarity (M) of the solution. What is the total volume (mL) of the solution
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What biochemical changes are required to convert tyrosine to (a) norepinephrine and (b) epinephrine? and 3- Some bacterial signaling systems involve kinases that transfer a phosphoryl group to a His side chain. Draw the phospho-His side chain.
Draw and name the six ethers that are isomeric with C5H12O. Which of them are Chiral.
Suppose you add 4.25 g of naphthalene, C10H8, to 67.9 g of benzene, C6H6, and they form an ideal solution. The vapor pressure of pure benzene is 0.1252 atm at the temperature of the experiment.
Sodium peroxide used to remove carbon dioxide from the air supply in space crafts. it works by reacting with the co2 in the air to produce sodium carbonate and O2.
If the cell potential is 0.061 V at 25?, what is the pH of the electrolyte at the hydrogen electrode
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