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Gay Lussac law.

Conclusion:  When the temperature increases, the pressure also increases and when the temperature decreases, the pressure also decreases.

The expression Gay-Lussac's law is used for each of the two relationships named after the French chemist Joseph Louis Gay-Lussac and which concern the properties of gases, though it is more usually applied to his law of combining volumes, the first listed here. The first law relates to volumes before and after a chemical reaction while the second concerns the pressure and temperature relationship for a sample of gas often known as Amonton´s law.

 

If the pressure increases the temperature also increase and vice versa, as we can see in the formula below.

p1/t1 = p2/t2

How to prepare a Schlenk Tube

A schlenk tube is a reaction vessel tipically used in air sensitive chemistry.

The first picture shows all the materials we need, and the second one how it should end.

Here are some videos to show how it's done:

                                          

1. First, we put vasseline in the stopcock, and we attach it with the rubber bands.
2. We put the stopper on top, and fold it so that no air can get in or out.

The Property of the Materials

Ionic compounds have such a high boiling point because they form very strong bonds and there is more energy required to break these bonds. For this reason the energy required for an ionic compound to boil is high.

Metallic bonds are very strong and for this reason a lot of energy is needed to break them. This is why metals have high melting points and boiling points.