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Ethanol vapor at 0.5 bar and 78 degrees celcius is compressed isothermally to 2 bar in a reversible process in a closed system a) draw a qualitative PV graph and show the path of the process. Mark all the relevant pressures and isotherms b)Calculate the enthalpy change of the ethanol c) calculate the entropy change of the ethanol d) what amount of heat is exchanged between the ethanol and the surroundings during the compression? Assume that ethanol vapor is an ideal gas with Cp=45J/Kmol. The saturation pressure of ethanol at 78 degrees celcius is 1bar.
sodium chloride is added to the water-cyclohexanone diethyl ether mixture. Explain how the addition of sodium chloride aids in isolation of the cyclohexanone product.
During the late 1800's, hard rock miners replaced candles with carbide lamps for work in mine shafts. The lamps worked by dripping water onto calcium carbide that generated acetylene gas (H2C2) that was burned.
How much heat is absorbed when 63.7g H2O(l) at 100 degrees C is converted to steam at 100 degrees C? Express your answer in kJ.
what particle or type of radiation needs to be included to balance the equation? 234Th ? ? + beta particle? Please explain why you chose your particular answer
Would you expect a carboxylic acid group within the water-free interior of a protein to have a higher or lower Ka than it would have if it occured on the protein's surface, where it is hydrated
If 3.7 g of butanoic acid, C4H8O2, is dissolved in enough water to make 1.0 L of solution, what is the resulting pH
The inital temp of the water was 25.2 degree c. At equilibrium the temp of the water and metal was 30.4 degreec -what was the change of temperature in the water
To do so she places 100.0g of water at 58.60C into the calorimeter which already contains 100.0g of water at 19.30C. The final temperature of the water in the calorimeter is 38.70C. What is the heat capacity of the calorimeter
A 0.2254 g sample of naphthalene (C8H10, 128.16 g/mol) was burned in a bomb calorimeter with a heat capacity of 2.18 kJ/K, and the temperature increased by 4.16°C. What is the molar enthalpy of combustion for this compound
The Kb of methylamine, CH3NH2, is 4.2 x 10-4. Calculate the pH of a solution of 0.431 M methylamine.
A buffer may be prepared by mixing a weak acid with a roughly equivalent amount of strong base. Which of the acids below is best for the preparation of a buffer with a pH of 4.00
The normal respiratory rate for a human being is 15.0 breaths per minute. The average volume of air for each breath is 505 cm3 at 20.0 degrees Celsius and 9.95 times ten to the fourth Pa. What is the volume of the air at STP that an individual bre..
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