Tuesday, 23 March 2010

SCES2324 Petrochemistry Exercise


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SCES2324 Petrochemistry Exercise 1

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Note: The discussion on Exercise 1 will be held on 3 March 2011 (12 - 1 pm). Please get your answers ready. Time table for Exercise 2 will inform later.

Real Gases


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This topic is discussing on more realistic situation where we can observe the experimental data was deviated from perfect gas law. There were situations or parameters that can be manipulated in order to "revise" the prefect gas equation and fit with the experimental observation. In this topic, CO2 has been chosen as an example to explain the intermolecular interaction, compression factor, virial coefficient, condensation and critical constant. These are resulting from the situation where we have a trapped gas in a container with variable molar volume and pressure at determined temperatures. 

In more advanced approach, Van der Waals was rather improved the perfect gas equation by applying smaller volume. Hence, affect the frequency and force of collision of the gas molecules. The redefine equation also bring about the prediction of critical compression factor of a gas. 

Thursday, 18 March 2010

The Properties of Gases


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This topic is a discussion on the perfect gas equation, starting from introducing pressure and temperature characters based on gas molecular aspect. It is also a revision on well known laws: Boyle, Charles and Avogadro. These principles lead us towards the kinetics model of gases. From both kinetic model and perfect gas equations, we able to derive an equation to estimate the velocity of a gas. The equation even more refined by applying Maxwell distribution where the two factors; mass of gas molecules and temperature of a gas were considered. These factors are similarly important as the frequency of gas molecules hitting each other and the wall. From these factors, we are also able to derive equation of the root means square speed, relative speed, mean speed and most probably speed. 

Reactions of Toluene and Xylene


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Kali ini kita masih membincangkan topik aromatik dan tindakbalas berkaitan dan juga aplikasi sebatian dan terbitannya. Topik utama dan yang penting adalah tindakbalas daripada toluena dan xylena. Seperti benzena, kedua-dua sebatian toluene dan xylena boleh ditransformasikan kepada sebatian-sebatian lain yang lebih berguna dan tinggi nilainya dipasaran. 
Selamat mentelaah!