The state of compounds depends on the temperature and on the pressure. We map the states of the matter on the diagram of phases. The pressure is put as ordinate and the temperature as abscise. The states are separated by full lines, the curves of transition of phase. The curve between the liquid and the […]
Posts from May 2015
Lesson 3 : past simple
Past simple ( I did ) Study this example: French chemist and microbiologist Louis Pasteur was born on December 27, 1822, in Dole, located in the Jura region of France. He grew up in the town of Arbois and his father, Jean-Joseph Pasteur, was a tanner and a sergeant major decorated with the Legion of […]
lesson 2 : present simple
Present simple (I do,work….) Study these situations: -I drive to work every day . -I like big cities -The games usually start at 8:00 pm. -What do you usually have for breakfast? – Paul is […]
Chapter 4d: Solids – lattice energy
In gases, the heat capacity was a resultant of translation, vibration and rotation. In a solid, there is no translation and no rotation. The atoms may vibe around their equilibrium position. The vibration involves a potential energy and a kinetic energy, each term participating for ½R. As a solid has 3 dimensions, Cv=3R However, this […]
Chapter 4c: Solids – crystallography
A characteristic of the solids is that they have their own shape. Liquids are taking the shape of their recipient and gases take all the available space. So solids have their own shape but some are malleable, can be cut, be creased or smashed or can be very rigid. As explained at the beginning of […]
Chapitre 4a: Les états de la matière: Les Gaz
Les états de la matière: Nous pouvons considérer trois différents états : gaz, liquide et solide et un mélange d’entre eux. Une différence importante entre les trois états de la matière est le volume qu’ils occupent. Un gaz prend tout l’espace disponible, un liquide prend la forme de son récipiant et un solide a sa […]