Homework Help: Chemistry

Posted by Shazra on Thursday, February 7, 2013 at 1:10pm.

A sample of sucrose(table sugar) with a mass of 1.32g is burned in a 1L bomb calori meter. The temperature changed from 25degree celcius to 27.31 degree celcius. Calculate the heat of combustion of sucrose in units of KJ/mol. The formular of sucrose is C12H22O11

Chemistry - DrBob222, Thursday, February 7, 2013 at 1:28pm
Note the correct spelling of celsius.

q = mass H2O x specific heat H2O x (Tfinal-Tinitial)
q = heat combustion
heat combustion/g = q/1.32g\
heat combustion/mol = (q/1.32)*molar mass. This will be in J/mol. Convert to kJ/mol.

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