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Cp,m for CHCl3 is (91.47 + 7.5x10-2T) J/(K mol) in a limited temperature range. One mol of this compound at 325 K is cooled at constant P to 275 K by contact with a large reserve at 275 K. The temperature of the reserve does not change. Calculate the change in enthalpy for the CHCl3 sample and change in entropy for the CHCl3 sample. Finally, Calculate the change in entropy for the reserve and change entropy of the universe.
explain the hazards associated with 1.0M CH3COOH solution, 0.10M BaCl2 solution and 0.10M Na2C2O4 solution.
Identify the reagents you would need to make the following substance via Grignard synthesis, and briefly describe your synthetic strategy.
When 25.0 mL of 0.750 M CdCl2 is mixed with 40.0 mL of 0.120 M (NH4)2S, CdS precipitates from the solution. How many moles of CdS is formed.
Suppose that the atomic mass unit (amu) had been defined as one-eighth of the average mass of an atom of sodium instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of magnesium be on this new scale
The Ka of a monoprotic weak acid is 7.78 × 10-3. What is the percent ionization of a 0.141 M solution of this acid?
Choose the selection which correctly identifies the forces which must be overcome to convert BH3 from a liquid to a gas.
Toluene (C6H5CH3) is a liquid compound similar to benzene (C6H6). Calculate the mole fraction of toluene in the solution that contains 132 g toluene and 115 g benzene.
Hydrazine is used as a rocket fuel. when 1.5 g of hydrazine N2H4, was burned in a bomb calorimeter, temp increased from 23.57 degrees celcius to 28.84 degrees celcius. The heat capacity of the calorimeter was 5.510 kJ/degree celcius. Determine the..
sodium hydroxide reacts with sulfuric acid to produce sodium sulfate and water. how many grams of sodium hydroxide are
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid,
Calculate the amount of heat required to heat a 3.5 kg gold bar from 21 degrees celsius to 67 degrees celcius.
What volume of 4.00 M HCL is required to react with excess NaCN to produce enough HCN to fill a room 16x7x4 feet at a pressure of 850 mmHg and 65 F
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