The vapor pressures of benzene at different temperatures are as follows: P/mmHg T/Ce 75 118 181 269 20 30 40 50 Suppose we have a sample of benzene vapor at 50C° and 120 mmHg: a) If it is cooled isobarically to 40ce, will it condense? b) And when does it cool down to 30C°? And up to 20Cº? c) Determine the temperature at which the benzene will begin to condense. d) Using a graphical method, determine the AH of vaporization.

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.