Chemistry 30 Calorimetry
(1.7490x10^1) g of an unknown sample is reacted with excess reagents inside a simple calorimeter. The mass of the aluminum cup making the outside of the calorimeter is (9.9200x10^1) g. There is (1.01x10^2) g of water inside the calorimeter. If the temperature of the calorimeter goes from 20.0 degrees C to (2.6300x10^1) degrees C and the molar mass of the unknown is (2.580x10^1) g/mol, what is the molar enthalpy of reaction with respect to the unknown? (Answer to 3 S.D. in kJ/mol)
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Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of a chemical species. A known amount of compound is placed inside a fixed volume container that is, in turn, filled with oxygen at a high enough pressure to ensure complete combustion. The fixed-volume container (the 'bomb') is then inserted into a bucket containing a precisely known volume of water. The oxygen and compound are ignited, and the temperature change in the water is recorded....
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measured temperature increase was 20.18 degrees * C . Determine the
heat of combustion in kper mole of sugar. The molar mass of sucrose
is 342.3g / (mol) .
A 20.0 g sample of the sugar sucrose (C12H22011) is combusted in a bomb calorimeter. C12H22011 (s) +1202 (g) - 12CO2(g) +11H2O The heat capacity of the calorimeter is 12.32 kJ/°C. The measured temperature increase was 20.18°C. Determine the...
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