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# Indirect Determination of Enthalpy Essay

Below is an essay on "Indirect Determination of Enthalpy" from Anti Essays, your source for research papers, essays, and term paper examples.

Determination of Enthalpy Change
Objective: to find the enthalpy change (∆H) in the decomposition of Sodium
Hydrogen Carbonate.

Materials: Calorimeter, 2.00 mol HCl, NaHCO3, Na2CO3, Lab Quest, Temperature

Procedure | Observations |
1. Obtain 50 mL of HCl in a beaker. | N/A |
2. Obtain around 2 grams of NaHCO3 in a weighing 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 about 5 to 6 seconds and then it dissolved. While this happened, the temperature of the HCl decreased. |
5. Dispose of the substance in the calorimeter and clean it. | The substance was thrown away. |
6. Repeat steps 1-5 three more times. Then do the same thing 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:
Values Measured for NaHCO3

Trials | Mass of NaHCO3
(±0.0001 g) | Volume of HCl(±0.5 mL) | Initial 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) | Initial Temperature
(±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 |

• Submitted by: rohan1221
• on November 12, 2012
• Category: Science And Technology
• Length: 321 words
• Views: 466
• Popularity Rank: 181563
• 1 rating(s)

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##### APA Citation

Indirect Determination of Enthalpy. Anti Essays. Retrieved December 12, 2018, from the World Wide Web: http://parimatch-stavka7.com/free-essays/Indirect-Determination-Of-Enthalpy-347896.html

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