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Use Kirchoff's law to calculate ?vapH , the molar enthalpy of vaporization, of a substance at 218.15 K, given that its standard enthalpy of vaporization is ?vapH=32.45 kJ mol at 25.0ºC. The heat capacities are Cp,m liq= 46.20 J K?1 mol?1 for the liquid and Cp,m vap = 32.50 J K?1 mol?1 for the vapor.
The mass of a cube of iron is 363 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
the IUPAC name for the aniline C6H5NH2 with both CH3 and CH2CH2CH3 attached to the nitrogen molecule?
The vapor pressure of water above this solution is found to be 0.3624 atm at 348.0 K. The vapor pressure of pure water at this temperature is 0.3804 atm.
A stock solution is prepared by adding 21 mL of 1 M AlCl3 to enough water to make 76 mL. What is the Cl- concentration of 40 mL of the stock solution?
When solving this problem, assume that no heat is lost from the calorimeter to the surroundings, the density of all solutions is 1.00 g/mL, the specific heat of all solutions is the same as that of water, and volumes are additive.
A precipitate of calcium phosphate is in contact with 653.9 mL of water. How many grams of calcium ion are present in the solution
A solid that weighs 0.008kg . Put the solid into a gradulated cyliner filled with water and the volume increases by 10cm 3 what is the denity?
Boyle's apprentice observes that the air trapped in air tube occupies 24.8 cm3 at 1.12 atm.by adding mercury to the tube increases the pressure on the trapped air to 2.64atm. assuming constant temperature, determine the new volume of air?
What is the barometric pressure exerted in pascals of a column of CHCl2Br (density = 2.451 g/cm3) 501.6 mm in height
A 47.5 g sample of metal was heated to 100 degrees C and then poured into 100 g of water at 24.0 degrees C. The temperature of the resulting mixture was 28.0 degrees C.
An equilibrium mixture of PCl5,PCl3 and Cl2 at a certain temperature contains 8.3×10^?3M PCl5 , 1.5×10^?2M PCl3 and 3.0×10^?2M Cl2.
The standard free energy of activation of a reaction A is 73.9kJ/mol-1 (17.7 kcal mol-1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol-1 (2.39 kcal mol-1) mo..
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