Enthalpy Problems Calorimetry Problems: Delta H = m(Delta t)c_p 500 kg of water

Question

Enthalpy Problems Calorimetry Problems: Delta H = m(Delta t)c_p 500 kg of water cools from 95 degree C to 20. Degree C. How much heat energy was released by the water? C_p of H_2O(l)is4.180 J/g degree C How much heat energy is required to heat 45 g of sheet Fe from 24 degree C to 200. Degree C? C_p of Fe(s) is 0.449 J/g degree C. A food chemist combusts 56 g of a chocolate bar in a calorimeter containing 1.5 L of water (density H_2O = 1g/1mL). The initial temperature was 19 degree C and the final temperature was 73 degree C. How much heat energy was absorbed by the water? What was the Delta H_rxn for this combustion reaction? 5.00g of uranium is cooled from 55 degree C to 18 degree C. The heat released was 20.35 J (Delta H = -20.35 J). Calculate the specific heat capacity (c_p) for uranium. Predict the final temperature of 1.5 L of water within a calorimeter when 10.0 g of potato chips are combusted. The initial temperature of the water was 19 degree C and the heat energ

Explanation / Answer

Enthalpy ofcombustion =338.58 Kj/ 56 gm=6.046Kj/g

T= 29,01 deg.c

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