The heat capacity of a bomb calorimeter was determined by burning6.79 g of metha

Question

The heat capacity of a bomb calorimeter was determined by burning6.79 g of methane (energy of combustion= -802 kJ/mol CH4) in thebomb. The temperature changed by 10.8 degrees celsius. a) What is the heat capacity of the bomb? b) A 12.6 g sample of acetylene, C2H2, produced a temperatureincrease of 16.9 degrees celsius in the same calorimeter. What is the energy of combustion of acetylene (inkJ/mol)?
show all steps please! a) What is the heat capacity of the bomb? b) A 12.6 g sample of acetylene, C2H2, produced a temperatureincrease of 16.9 degrees celsius in the same calorimeter. What is the energy of combustion of acetylene (inkJ/mol)?
show all steps please!

Explanation / Answer

   We Know that :     According to Thermodynamic Relationship:          Q = m s t          CH4 + 2 O2 -----> CO2 + 2 H2 O   + Energy          802000 J = 6.79 gm x s x 10.80C               s = 10936.5624 J / gm 0C       The heat capacity of theCalorimeter is 10936.5624 J / gm0C          Acetylene onCombustion produces the products as CO2 & H2O          C2H2   + 5 / 2 O2   ------>   2CO2 + H2O         Q = 12.6 gm / 26 gm / mole x 10936.5624 J/ 0C   x 16.9 0C              = 89570.446056 J / mole               = 89.57044 KJ / mole of Energy isReleasesd.          Acetylene onCombustion produces the products as CO2 & H2O          C2H2   + 5 / 2 O2   ------>   2CO2 + H2O         Q = 12.6 gm / 26 gm / mole x 10936.5624 J/ 0C   x 16.9 0C              = 89570.446056 J / mole               = 89.57044 KJ / mole of Energy isReleasesd.

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