WebIn bomb calorimeter q (water ) = C Delta t = Heat of combustion of 1.535 g CH 3 OH q (water) in kJ . ∆H = - q (water)/ n n = moles of methanol. Logged Organic Chemistry Tutor, Online Chemistry Tutor, AP Chemistry Tutor, IB Chemistry Tutor uma Administrator Hero Member Posts: 915 Re: Thermodynamics-heat of combustion and Hess's law WebNov 4, 2024 · Ccal = heat capacity of the calorimeter = 4.900 kJ/ºC ∆T = change in temperature = 26.63º - 22.41º = 4.22ºC ∆H = (4.900 kJ/deg) (4.22 deg) = -20.68 kJ (value is negative because temperature increased making this an exothermic reaction) Since we have 1.231 g sucrose, we have 1.231 g / 342.2 g/mol = 0.00360 moles sucrose

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