High School Chemistry Books
With each new edition has been tried to improve the pedagogy used to develop in students and critical thinking skills and problem solving, and finding new and effective ways to present abstract chemical concepts. The opening pages of each chapter have a section entitled "Report of the chapter, which provides students with an overview of the issues addressed in it. Like the previous edition has been a good mix of easy problems, intermediate and difficult at the end of each chapter. In addition to the special problems added a new category that contains other more challenging. The high school chemistry books is a central science, because it provides support to other sciences such as physics, biology, geology, petrochemistry, etc. . . . A property of a quantity of material is something we can measure with respect to that quantity of matter. Among the most commonly encountered properties are: mass, volume, shape, temperature, color, smell, taste and texture. The complete set of properties defines the object. To compare different objects or substances, we compare their properties. Gases, liquids and solids can be distinguished because some of its properties are different. For example, solid water (ice) is well defined shape and volume, but if you melt the ice to get liquid water we find that although the volume remains well defined, the form no: liquid water takes the shape of the container that contains. If we proceed to evaporate water, nor even the volume is well defined: the steam completely fills its container. The amount of material that change their shape or volume does not alter the amount of mass. In 1 kg of gas is as much matter as in 1 kg of solid. If for the above status changes start with 1 kg of ice, finish with 1 kg of water vapor. If the sound seems "heavier" because the solid has a higher density. The solids have high school chemistry books densities, slightly higher than the liquid, while gases have very low densities. As an example, lead (Pb, a very dense metal) has a density of 11,340 g / mL, while water has a density of 1 g / mL. Nitrogen (N), the most abundant component of air, has a density of only 0. 00125 g / mL. All properties mentioned correspond to physical properties. The chemical properties refer to the behavior of matter that does alter its properties. . . .
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