Lab-10 - K I NG FAHD UNI VERSI TY OF PETROLEUM & M I NERALS...

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KING FAHD UNIVERSITY OF PETROLEUM & MINERALS CHEMISTRY DEPARTMENT EXPERIMENTS IN PHYSICAL CHEMISTRY CHEM-311 Pr epar ed For Dr. M . I . W azeer EX P # 10 sur f a ce t ent ion by r ing met hod DONE BY: Al-Ghamdi, Kamal S. ID#: 901432 SEC.#: 56 D ate Of P er for mance: 2 2 -5 -1 9 9 6 D ate Of Submission: 2 9 -5 -1 9 9 6
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INTRODUCTION I-Objective:- -To measure the surface tension ( γ ) for ethylene glycol. -To obtain the temperature coefficient k γ . -To obtain the total surface energy per unit area U A . II-Theory:- Intermolecular forces in the liquid phase are very much larger than intermolecular forces in the gaseous phase. As a result the liquid molecules at a gas-liquid interface experience a net force that points into the liquid phase. The specific surface energy, ε of the liquid is given by:- ε E A = and ε is identical to the liquid surface tension coefficient γ , given by:- γ = F l or γ π = F 4 r Defining a molar surface tension, γ m by:- γ γ = 'V m 2 3 where V m is the molar volume of the liquid. From equation (5)
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This note was uploaded on 04/13/2011 for the course CHEM 311 taught by Professor Alial-habib during the Fall '09 term at King Fahd University of Petroleum & Minerals.

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Lab-10 - K I NG FAHD UNI VERSI TY OF PETROLEUM & M I NERALS...

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