When 1.550 g of liquid hexane (c6h14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87∘c to 38.13∘c. find δerxn for the reaction in kj/mol hexane. the heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.73 kj/∘c. express your answer in kilojoules per mole to three significant figures.2. the combustion of toluene has a δerxn of –3.91×103 kj/mol. when 1.55 g of toluene (c7h8) undergoes combustion in a bomb calorimeter, the temperature rises from 23.12∘c to 37.57∘c. find the heat capacity of the bomb calorimeter. express the heat capacity in kilojoules per degree celsius to three significant

Explanation:

1). The given data is as follows.

       ,      

               C = 5.73

Hence, calculate the change in enthalpy of the reaction as follows.

                     =

                     = -70.25 KJ

As,  number of moles =

                                    =

                                    = 0.018 mol

Therefore, enthalpy of reaction in kJ/mol hexane is as follows.

                          = kJ/mol

Thus, we can conclude that for the reaction in kJ/mol hexane is kJ/mol .

2).  As we know that,

     Number of moles =

                                  =

                                   = 0.017 mol

                      =

                      = -65.875 kJ

As,    

                    -65.875 kJ =

                           C = 4.56

Hence, heat capacity of the bomb calorimeter is 4.56 .

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