{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Therm95 - Data calculations Heat of enthalpy CH3CH2Cl-10...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Therm95 Amy Corcoran Submitted: May 9, 2011
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Abstract: The objective of this experiment was to determine the optimal temperature in which to run an elimination reaction in a laboratory setting. The elimination reaction assigned is as follows: CH3CH2Cl = HCl + CH2=CH2 The optimal temperature in which to run the reaction will be determined by analyzing the data calculated in the Therm Group Additivity program. This program uses the group additivity information from each molecule present in the reaction to calculate ΔG, the change in free energy in the system; ΔU, the change in internal energy; ΔH, the change in enthalpy; ΔS, the change in entropy; Kc, the equilibrium constant expressed in terms of concentration. Kp, the equilibrium constant in terms of pressure, can be calculated by using the following formulas: ΔGrxn = ΔHrxn – TΔSrxn Kp=e^(-ΔGrxn/RT) Groups: 1. C/C/H3 2. C/C/Cl/H2 3. Cl/H 4. 2 Cd/H2
Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Data calculations: Heat of enthalpy CH3CH2Cl: -10 + unknown = unknown2 Cl/H: unknown CH2=CH2: 2 x 6.27= 12.54 (All Therm data is located in the APPENDIX) Species CH3CH2Cl Units: KCAL Groups: 2 1. C/C/H3 2. C/C/Cl/H2 Rotors: 2 Symmetry: 2 (Repeat for each group) Conclusion: The values for ΔG, ΔU, ΔH, ΔS, and Kc were calculated using the Therms Group Additvity program. Using the data gathered from therm, the values of Kp were calculated. As the temperature increased, ΔG decreased. The ΔH decreased and ΔS increased as the temperature increased, but then decreased after the temperature exceeded 600K. The optimal temperature to run the reaction would be 400K. This temperature provides the biggest change in enthalpy and entropy, while the amount of free energy in the system is still a normal level. After 500K the amount of free energy released increases drastically. APPENDIX...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern