A 0.500 g sample of TNT (C2H5N206) is burned in a bomb calorimeter containing 610 grams of water at an initial temperature of 20.0°C. After the reaction, the final temperature of the water is
22.7°C. The heat capacity of the calorimeter is 420 J/°C.
How much heat was produced in the combustion of TNT?
A. 3374kJ
B. 8.04kJ
C. 2.97kJ
D. 8025 kJ
E. 3.37kJ
Was the heat released or absorbed by the water and calorimeter?
A. Absorbed
B. Released

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.