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From enjoying the warmth of a fire to baking a cake, people benefit from chemical changes every day. This program illustrates and explains numerous examples of chemical changes. It also takes a look at some of the common characteristics of reactions that occur chemically. Concepts and terminology explored include: physical change, chemical change, reaction, color change, gas, and heat.
(Source: DCMP)
From cooking food to enjoying the warmth of a fire, chemical reactions happen every day. Students learn the major characteristics and types of chemical reactions. Additional concepts and terminology discussed include: reactants, products, physical and chemical changes, chemical equation, reaction rate, and indicators of chemical reactions.
Consider the following: humans live twice as long as their ancient ancestors did even though their bodies contain different types of synthetic and sometimes toxic substances. This is an unpleasant part of life in the modern age. Explores the health impact, wide variety, and alarming ubiquity of manufactured chemicals. Shows how communities around the world, including Inuit seal hunters, Asian and African farmers, and residents of an industrial town in the United States address the pervasiveness of molecular compounds found in pesticides, plastics, and other products. The benefits of these chemicals are weighed against their dangers.
Follow a chemical engineer at an oil refinery as he interacts with team members and uses technology to keep the refinery working at optimum levels. He also offers advice on educational and co-op opportunities for becoming a chemical engineer. Part of the "Career Connections" series.
The study of thermodynamics can lead to predicting how chemical reactions will proceed or how much energy is required or released during the reactions. To better understand chemical reactions, a new thermodynamic value called “enthalpy” is introduced. Students will examine the practical applications of bond enthalpies, calorimetry, and other measurements of the energy in chemical reactions. They will also see how the understanding of thermodynamics and enthalpy is helping scientists optimize the use of crop waste for biofuels and build more efficient automobile engines. Part of Chemistry: Challenges and Solutions Series.
To manipulate chemical reactions on a large scale, scientists use stoichiometry to quantify those reactions. The use of stoichiometry ensures there are the right amount of reactants and products. Without it, reactions can be incomplete, with expensive materials wasted and harmful byproducts created. Using stoichiometry, scientists are creating chemicals that take the place of petroleum in fabricating sustainable materials. At a different lab, scientists are mimicking the process of photosynthesis to convert the sun’s energy into storable chemical energy. Part of Chemistry: Challenges and Solutions Series.
Very little in the physical world around us occurs without chemical reactions being involved. Takes an in-depth look at five common products that are in use all around us. Also, explores the chemistry behind their manufacture and/or use, including chemical equations. The products are soap, polystyrene, aluminum, paint, and car batteries.
Experiments show the production and properties of carbon dioxide and its use as a fire extinguisher. The second part demonstrates the effect of surface area, temperature, and concentration on chemical reaction rates.
Anita Kalathil shows some of the latest chemistry projects taking place at Proctor & Gamble and what her typical day is like inside and outside the lab. Find out what it’s like to be a chemical engineer.
Some chemical reactions happen spontaneously, like metal rusting. Other reactions are non-spontaneous and need to absorb energy in order to occur. Using the Second Law of Thermodynamics, the principle of entropy, and the calculation of Gibbs free energy, scientists can predict which reactions will occur and vary the conditions to make more of the desired products. In equilibrium reactions, both products and reactants are always present. Equilibrium reactions in the human body are essential for life and can be exploited in chemical manufacturing as well. Part of the series Chemistry: Challenges And Solutions.
Sherlock Olmos decides to dig deeper into dark corner of this great house to investigate the suspicious behavior of some chemical elements. The exchange of electrons and the characteristics of hydrogen, fluorine gas, and the noble gases are the primary subjects of his investigation. Part of Chemistry: Solved by Sherlock Olmos Series.
Deep in Southern Mexico's jungle, the Villa Luz limestone caves support an ecosystem that thrives in a highly poisonous, acidic environment. This rare type of cave is found in few spots on Earth. Geologists and biologists wear gas masks and protective outerwear to explore the caves. All life forms, from microbial colonies to spiders, fish and bats, are interdependent upon the toxic soup of water, sulphur-oxide and hydrogen monoxide for survival.
Solutions are uniform mixtures of molecules in which any of the phases of matter can be dissolved in another phase. Whether solids, liquids, or gases, solution chemistry is important because most chemical reactions, whether in the laboratory or in nature, take place in solutions. In particular, solutions with water as the solvent are the core of all biology. Extending the particle model of matter to solutions enables chemists to predict what will happen to a deep-sea diver who breathes different mixtures of gases or to the life forms in the ocean as carbon dioxide levels rise in the atmosphere. Part of Chemistry: Challenges and Solutions Series.
From cleaning supplies to pharmaceuticals, surfactants are the compounds that make soap bubbly, paint spread smoothly, and medication dissolve more easily. Most surfactants are currently made from non-renewable petroleum sources and many of these surfactants don’t break down easily after they are discarded. Some can persist in the environment for decades. Their widespread use and environmental persistence has raised concerns about toxicity. At the University of Arizona, Jeanne Pemberton and her cross-disciplinary team work to create new “green” surfactants based on sugars that are generally known as glycolipids. With support from the National Science Foundation, Pemberton and her team are exploring the recent discovery of a versatile synthesis that allows production of many different types of glycolipids in large quantities. Some of these glycolipids are modeled after naturally occurring biosurfactants and some can be produced relatively inexpensively using renewable natural resources. Part of the National Science Foundation Series “Science Nation.”
Part of a series that features a wide variety of video footage, photographs, diagrams, graphics, and labels. For this particular video, students will focus on safety procedures for handling dangerous materials in a lab. Part of the Science Video Vocab series.
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Topics covered include precipitation reactions, oxidation-reduction reactions, kinetics, equilibrium, and nuclear reactions. Part of the "Chemistry" series.
Part of the "Chemistry in Action" series. Chemicals interacting with each other are one of the most fascinating topics in chemistry. Fireworks, burning flares, and rusting all illustrate chemical reactions. Describes the different types of reactions as well as the process of balancing chemical equations. Introduces the following terminology: chemical equations, Law of Conservation of Mass, decomposition and synthesis reactions, replacement reactions, and reaction rates.
As scientists discovered more and more chemical elements, they began developing systems to organize the elements by their chemical properties, leading to the modern periodic table. Through its organization, the periodic table makes clear the underlying chemical and physical trends among the elements. The periodic table is being continually updated even today as scientists strive to create new elements in laboratories. Part of the series Chemistry: Challenges And Solutions.
Part of the "Chemistry in Action" series. Demonstrates how chemical compounds are placed into groups so that they may be studied easier. Explores acids and bases, emphasizing their nature and common everyday uses. Discusses carbon compounds, and introduces the following terminology: acid, base, pH, salt, carbon, organic, and hydrocarbon.
Showing collections 1 to 6 of 6
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
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Biology related concepts
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Collection of anatomy resources
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A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
