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Heat of Reaction

Experiment to determine heat of reaction

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Heat of Reaction

  1. 1. EXPERIMENT TO DETERMINE HEAT OF REACTION HEAT OF PRECIPITATION HEAT OF DISPLACEMENT HEAT OF NEUTRALIZATION HEAT OF COMBUSTION Procedure: 1. Measure 25 cm3 of 0.5 mol dm-3 sodium chloride, NaCl solution using a measuring cylinder and pour the solution into a polystyrene cup. 2. Measure and record the initial temperature of sodium chloride solution. 3. Measure 25 cm3 of 0.5 mol dm-3 silver nitrate, AgNO3 solution using a measuring cylinder and pour the solution into another polystyrene cup. 4. Measure and record the initial temperature of silver nitrate solution. 5. Pour silver nitrate, AgNO3 solution into the polystyrene containing sodium chloride, NaCl solution. 6. Stir the mixture and record the highest temperature, θ3 Procedure: 1. Measure 25 cm3 of 0.2 mol dm-3 copper(II) nitrate solution using a measuring cylinder. 2. Pour the solution into a polystyrene cup. 3. Measure and record the initial temperature, θ1 of copper(II) nitrate solution. 4. Measure 0.5 g of zinc powder and added into the polystyrene quickly. 5. Stir the mixture and the highest temperature is recorded, θ2 Procedure: 1. 50 cm3 of 2.0 mol dm-3 sodium hydroxide solution is measured using a measuring cylinder and poured into a plastic cup. 2. The initial temperature of sodium hydroxide solution is measured after a few minutes. 3. 50 cm3 of 2.0 mol dm-3 hydrochloric acid is measured using another measuring cylinder and poured into a plastic cup. 4. The initial temperature of hydrochloric acid solution is measured after a few minutes. 5. The hydrochloric acid is then poured quickly and carefully into the sodium hydroxide solution. 6. The mixture is stirred using thermometer and the highest temperature reached is recorded. Procedure: 1. 100 cm3 of water is measured using a measuring cylinder. 2. Poured into a copper tin. 3. The initial temperature of water is measured and recorded, θ1 . 4. The spirit lamp is filled with butanol and weighed, x g 5. A spirit lamp is light and put under the copper tin. 6. The water is stirred continuously with a thermometer 7. When the temperature of water increased by 30 °C, the flame is put off 8. The spirit lamp is weighed again, y g 9. The highest temperature is recorded, θ2 Tabulation of data: Initial temperature silver nitrate solution, °C θ1 Initial temperature sodium chloride solution, °C θ2 Highest temperature, °C θ3 Tabulation of data: Initial temperature copper(II) nitrate solution, °C θ1 Highest temperature, °C θ3 Tabulation of data: Initial temperature sodium hydroxide solution, °C θ1 Initial temperature hydrochloric acid solution, °C θ2 Highest temperature, °C θ3 Tabulation of data: Mass of weight of spirit lamp + butanol / g x Final mass of spirit lamp + butanol / g y Mass of butanol used / g x – y = z Highest temperature of water / °C θ2 Initial temperature of water / °C θ1 Increased in temperature / °C θ2 - θ1 = θ3

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