M1 - Abstract In this experiment a plot of time Vs t/h-ho...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Abstract In this experiment, a plot of time Vs t/h-ho was made to get the slope s and then use it to calculate the diffusion coefficient D AB experimentally. Also, D AB was calculated theoretically by using 2 empirical correlations. D AB was found for 4 different components. They are Acetone, Chloroform, n-Hexane and Methanol. The components were put in tubes where the liquid level was measured at a certain time interval. Values of D AB experimental and theoretical were compared and the % error was discussed. For example, experimental D AB for acetone was 0.101 cm 2 /s and the theoritical one was 0.07 cm 2 /s and the error was 43.7%. Finally, the report ends with a conclusion and recommendation. Introduction The diffusion coefficient for gases is affected by change of temperature and pressure and composition. Diffusion coefficient values of gases are much higher than in liquids and solids. The diffusivity of gases can be measured using evaporation tubes and that was done in this experiment. The simple theory of diffusion coefficient method involves the usual assumption of constant pressure and temperature, constant diffusion coefficient, one-dimensional diffusion, axial symmetry and absence of convection effects. In addition, gas is assumed insoluble; hence the gas in the tube is stagnant. Finally steady state condition. So that, the concentration gradient between the liquid level and the top of
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the 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