# Equipment weigh boat digital scale 100ml graduated

• No School
• AA 1
• 5

This preview shows page 1 - 5 out of 5 pages.

Equipment Weigh boat Digital scale 100mL graduated cylinder 100mL volumetric flask Copper (II) sulfate Aluminum Calorimeter Temperature probe Laptop Stir rod Distilled water Triple beam balance Raw Data
Owen Kulp May 3, 2019 Academic chemistry Period 2 Partner: Ashleigh Moss Components Result Calorimeter (empty) 21.8 g. Calorimeter and solution 120.37 g. Calorimeter and contents (final) 123.35 g. Copper (II) Chloride 2.557 g. Aluminum 0.200 g. Initial temperature © 23.8 Final temperature © 32.0 Reaction 2 Al ( s ) + 3 Cu Cl 2 ( aq ) 2 AlCl 3 ( aq )+ 3 Cu ( s ) ¿ + 3 Cu ( s ) ¿ 2 Al + 3 + 6 Cl ¿ 2 Al ( s ) + 3 Cu + 2 + 6 Cl ¿ 2 Al ( s ) + 3 Cu + 2 2 Al + 3 + 3 Cu ( s ) ¿ Al ( s ) → Al + 3 + 3 e ¿ 1.66V. ¿ →Cu ( s ) Cu + 2 + 2 e ¿ 0.34V.
Owen Kulp May 3, 2019 Academic chemistry Period 2 Partner: Ashleigh Moss Calculations Molarity of solute 0.015 mol 0.1 L. = 0.150 Mass of Copper (II) chloride excess 0.200 g . Al ( 1 molAl 26.98 g. Al ) ( 1 mol Al Cl 3 2 mol Al ) ( 133.33 1 mol AlCl 3 ) = 0.494 g Al 2.557 gCuCl 2 ( 1 63.35 )( 3 1 ) ( 134.45 g.CuCl 2 1 molCu ) = 3.626 g.Cu Volume of Copper (II) Chloride excess 0.200 g Al 1 × 1 mol Al 26.98 g Al × 3 molCu Cl 2 2 mol Al × 1000 mL 0.150 mol = 74.1 mL 100 mL 74.1 mL = 25.9 mL = 30 mL Standard Free Energy Change ∆G ° =− nFE ° ( 6 ) ( 96485 ) ( 2.00 ) =− 1,157,820 J . =− 1,200 kJ Enthalpy of reaction q = C p m ∆T 4.18 × ( 123.35 23.81 ) ( 32.0 23.4 ) = 3578 J . 3578 0.200 gAl 1 × 1 molAl 26.98 gAl × 2 molAl 1 = 1.3 × 10 3 kJ Results Calculated Result Mass of Copper (II) Chloride 2.557 g. Mass of elemental copper 3.626 g. Cu
Owen Kulp May 3, 2019 Academic chemistry Period 2 Partner: Ashleigh Moss Standard Free energy Change -1,200 kJ Volume of Excess 30 mL Molar enthalpy of reaction -1.3x10 3 kJ/mol rxn Standard Deviation σ = ( X ´ X ) 2 n (− 1,300 −− 1096 ) 2 +(− 1000 ( 1096 ) ) 2 +(− 930 ( 1096 ) ) 2 +(− 1200 ( 1096 ) ) 2 +(− 970 ( 1096 ) ) 2 5 = 140.0 k Conclusion This experiment was created to demonstrate how calorimetry can be used to find the enthalpy of a reaction. An enthalpy of reaction is the change of heat in a system when a reaction takes place. This particular experiment dealt with the enthalpy of reaction within the reaction of

#### You've reached the end of your free preview.

Want to read all 5 pages?

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern