Indirect Determination of Enthalpy

Determination of Enthalpy Change Objective: to find the atomic number 1 convert (?H) in the decomposition of Sodium Hydrogen Carbonate. Materials: Calorimeter, 2.00 groyne HCl, NaHCO3, Na2CO3, research laboratory Quest, Temperature Probe, Graduated cylinder, Balance scale. Procedure| Observations| 1. pick up 50 mL of HCl in a beaker.| N/A| 2. Obtain almost 2 grams of NaHCO3 in a calculation boat.| N/A| 3. Pour the HCl into the calorimeter and then measure the temperature of it.| The temperature of the HCl in the calorimeter was measured.| 4. After a few seconds, pour the NaHCO3 into the calorimeter and measure the highest temperature reached in the reaction.| When the NaHCO3 was dropped into the HCl, it started bubbling for nearly 5 to 6 seconds and then it dissolved. man this happened, the temperature of the HCl decreased.| 5. Dispose of the center in the calorimeter and clean it.| The substan ce was impel away.| 6. Repeat locomote 1-5 three more times. Then do the same function for Na2CO3.| When the Na2CO3 was dropped into the HCl, it also bubbled for about 5 to 6 seconds. But when this happened, the temperature of the HCl increased.

| quantitative Data: value Measured for NaHCO3 Trials| citizenry of NaHCO3 (±0.0001 g)| Volume of HCl(±0.5 mL)| sign Temperature(±0.1 ºC)| Final Temperature(±0.1 ºC)| 1| 1.9498| 50.5| 25.8| 23.9| 2| 2.0371| 49.8| 25.6| 23.9| 3| 2.0393| 51.8| 25.5| 23.9| 4| 2.0749| 49.9| 25.8| 24.3| Values Measured for Na2CO3 Trials| Mass of Na2CO3(±0.0001 g)| Volume of HCl(±0.5 mL)| sign Temperatu! re (±0.1 ºC)| Final Temperature (±0.1 ºC)| 1| 2.0187| 51.5| 26.2| 27.2| 2| 2.4959| 48.9| 26.1| 27.4| 3| 2.0859| 51.3| 25.8| 26.9| 4| 1.9913| 51.5| 25.9| 27.1|If you indispensableness to get a full essay, order it on our website: OrderCustomPaper.com

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