Enthalpy lab report

.pdf

School

Marquette University *

*We aren’t endorsed by this school

Course

1001

Subject

Chemistry

Date

Feb 20, 2024

Type

pdf

Pages

4

Uploaded by CommodoreFangAlbatross43

CHEM 1001 ENTHALPY Laboratory Report NAME : Liam Cedeno Agosto DATE : 4/18/23 SECTION : 403 TA : Audrey Vice A. Goals/Purpose of Experiment ( 2 Points, ~50 words ) : The purpose of this experiment is to understand energy changes associated with chemical reactions and be able to measure these chemical reaction changes using a simple calorimeter. B. Theory/Introduction ( 6 Points, ~100 words ) : All chemical reactions have heat/energy exchanges. When energy is gained, the reaction in endothermic, whereas when energy is release or lost, the reaction is exothermic. These are known are thermochemical reactions. We can calculate these reactions through enthalpy change. C. Procedure summary ( 5 Points, ~100 words ) : For this experiment, we were given 2.0 M of HCl and NaOH, and water. It was divided into three parts. Part one dealt with HCl and NaOH reacting. We were to add about 10 mL of each into separate graduated cylinders, and we were to pour one into a Styrofoam cup first. After starting up the measure.net station, we were to wait up to 15 seconds before pressing start, then wait another up to 15 seconds to measure the temperature before pouring the other substance after and wait until the temperature stabilized before stopping and saving the data. We were to repeat these two more times, one with HCl and water, and one with NaOH and water. D. Results and Calculations: ( 12 Points ) : Solution A Solution B Volume solution A (mL) Volume solution B (mL) Total mass ( m , g) Limiting reagent (moles) Initial Temp (ºC) Final Temp (ºC) Change in temp (ΔT , ºC) Q rxn (J) ΔH (kJ/mol)
NaOH HCl 10 mL 10 mL 20 m2g 0.02 20.74 C 25.98 C 5.24 C 438.48 21.92 NaOH water 10 mL 10 mL 20 m2g 0.02 20.09 C 21.66 C 1.57 C 131.37 6.56 HCl water 10 mL 10 mL 20 m2g 0.02 19.78 C 21.86 C 2.08 C 174.05 8.0 ΔH 3 (NaOH + HCl) = ΔH 1 (rxn) - ΔH 2a (NaOH dilution) - ΔH 2b (HCl dilution) ΔH 3 (NaOH + HCl) = 21.92 kJ/mol – 6.56 kJ/mol – 8.0 kJ/mol= 7.36 kJ/mol Δ H Theoretical (NaOH + HCl) = Σ n Δ H f °(products) – Σ m Δ H f °(reactants) (-407.25 kJ/mol) + (-285.83 kJ/mol) - (-470.09kJ/mol) + (-167.15kJ/mol) = -55.84 kJ/mol % 𝑒𝑟𝑟𝑜𝑟 NaOH-HCl = |experimental−theoretical| theoretical × 100= ( -55.84) – 7.36/7.36 * 100= -113.18% Insert all 3 graphs here (no screenshot/picture)
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help
Recommended textbooks for you
Text book image
Chemistry for Engineering Students
Chemistry
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Cengage Learning
Text book image
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry: An Atoms First Approach
Chemistry
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Cengage Learning
Text book image
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning
SEE MORE TEXTBOOKS
Recommended textbooks for you
Text book image
Chemistry for Engineering Students
Chemistry
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Cengage Learning
Text book image
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry: An Atoms First Approach
Chemistry
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Cengage Learning
Text book image
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning
SEE MORE TEXTBOOKS