Question

Determination of Heat of Combustion • To determine the enthalpy of combustion of glucose. ? 2.250-g of glucose (C6H12O6) is completely combusted in a "bomb" calorimeter, the temperature of calorimeter increases from 21.40 °C to 29.85 °C. The calorimeter contains 775 g of water (specific heat = 4.184 J/g?°C), and the "bomb" has a heat capacity of 893 J/°C. ? (a) How much heat is produced by the combustion of the glucose sample? (b) What is the heat of combustion for 1.00 g of glucose? (c) Calculate the molar enthalpy of combustion of glucose (?H, in kJ/mol). • (Answer: (a) -34.9 kJ; (b) -15.5 kJ/g; (c) -2800 kJ/mol)

          Determination of Heat of Combustion
• To determine the enthalpy of combustion of glucose.

? 2.250-g of glucose (C6H12O6) is completely combusted in a "bomb" calorimeter, the temperature of calorimeter increases from 21.40 °C to 29.85 °C. The calorimeter contains 775 g of water (specific heat = 4.184 J/g?°C), and the "bomb" has a heat capacity of 893 J/°C.
? (a) How much heat is produced by the combustion of the glucose sample? (b) What is the heat of combustion for 1.00 g of glucose? (c) Calculate the molar enthalpy of combustion of glucose (?H, in kJ/mol).

• (Answer: (a) -34.9 kJ; (b) -15.5 kJ/g; (c) -2800 kJ/mol)

Determination of Heat of Combustion
• To determine the enthalpy of combustion of glucose.

? 2.250-g of glucose (C6H12O6) is completely combusted in a "bomb" calorimeter, the temperature of calorimeter increases from 21.40 °C to 29.85 °C. The calorimeter contains 775 g of water (specific heat = 4.184 J/g?°C), and the "bomb" has a heat capacity of 893 J/°C.
? (a) How much heat is produced by the combustion of the glucose sample? (b) What is the heat of combustion for 1.00 g of glucose? (c) Calculate the molar enthalpy of combustion of glucose (?H, in kJ/mol).

• (Answer: (a) -34.9 kJ; (b) -15.5 kJ/g; (c) -2800 kJ/mol)

Added by Guillermo C.

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