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Under constant-volume conditions the heat of combustion of benzoic acid (C6H5COOH) is 26.38 kJ/g. A 1.640-g sample of benzoic acid is burned in a bomb calorimeter. The temperature of the calorimeter increases from 22.23ºC to 27.20ºC.
a) What is the total heat capacity of the calorimeter?b)A 1.320-g sample of a new organic substance is combusted in the same calorimeter. Thetemperature of the calorimeter increases from 22.14ºC to 26.82ºC. What is the heat ofcombustion per gram of the new substance?c)Suppose that in changing samples, a portion of the water in the calorimeter weere lost. In what way, if any, would this change the heat capacity of the calorimeter?
Briefly describe the pathway of the protons and electrons of two hydrogen atoms that come from NADH/H+ and pass through the electron transport chain apparatus (including complexes I - V). What are the major electron carriers within these complexes
use oxidation number to show which element is oxidized and which element is reduced in this equation 2H2o2----2H2O+O2
A tank initially at a pressure of 6.70 atm contains 2.0 moles of oxygen gas at 25.0 degrees celsius. Its temperature is then increased to 45.0 degrees celsius
Provide a stepwise mechanism for the reaction, showing all electron movement using the curved arrow convention. Sketch a qualitative energy level diagram for the mechanism labeling all relevant points.
The freezing point depression constant, Kf, for water is 1.86?C/m. Suppose that 5.00 g of mercury(I) nitrate was dissolved in 100.0 g of water
A mass of 48.5 g of a certain substance can be dissolved in 29.1 cm3 of water at 20 Degree Celius. Calculate the solubility of this substance per gram of water at the same temperature.
How many grams of K2SO4 are there in 243 grams of an aqueous solution that is 28.7 % by weight K2SO4.
Assuming that equal numbers of moles of each were released into the air at ground level, rank these four compounds in terms of their potential to catalytically destroy ozone in the stratosphere. Explain
using a sample as a mixture of cucl2 agno3and fecl3. when a sample of 1.0000-g of this cucl2 agno3and fecl3 mixture is
NaOH was added. Assuming no volume change, calculate the pH of the solution
Assuming the mixture has the same specific heat (4.184J/goC) and density (1.00 g/cm3) as water, calculate the heat (in J) transferred to the surroundings
A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
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