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categoryالكيمياء schoolبكالوريوس event_available2026-07-15

السؤال

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A 5.000 g sample of methanol, CH,OH, was combusted in the presence of excess oxygen in a bomb calorimeter containing 4000 g of water. The temperature of the water increased from 24.000°C to 29.765°C. The heat capacity of the calorimeter was 2657 J/°C. The specific heat of water is 4.184 J/g°C. Calculate the energy for the reaction in kJ/mol. A. -314 kJ/mol B. -789 kJ/mol C. -716 kJ/mol D. -121 kJ/mol E. -69.5 kJ/mol

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