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The Science of Energy - Resources and Power Explained
Energy is, without a doubt, the very foundation of the universe. It's the engine that powers life and fuels the evolution of human civilization. Yet for all its importance, what energy really is and how it works remains a mystery to most non-scientists. For example:
  • Where does most of…
Chemistry, 2nd Edition Course
Many students struggle in high school chemistry. Even if they succeed in earning a good grade, they often still feel confused and unconfident. Why is this? And what can be done to help every student succeed in this vitally important course? Success in chemistry, according to veteran science teacher Professor…
Advanced Molarity Problems
You are asked to take the concepts you learned about molarity in the last two lectures and apply them to a number of unfamiliar problems. These problems offer an opportunity to test your comprehension of the concepts you've been exploring.
Elements, Atoms, and the Periodic Table
In the next three lectures, you cover some fundamental topics that you'll need before you can launch into your study of chemistry. You examine the basic building blocks of matter--elements and the atoms that constitute them--and you learn how to interpret the information about elements presented in the periodic table
Ions, Compounds, and Interpreting Formulas
Learn about protons, electrons, and neutrons; how ions are formed from atoms; how these ions can combine to form compounds; and how you can determine the formulas of these compounds. Some molecular substances are discussed and you are introduced to the final number associated with every element--its atomic weight.
Quantitative Reasoning in Everyday Life
Only a handful of important ideas must be mastered in order to be successful at solving chemistry problems. In this lecture, you review some basic guidelines for approaching any chemistry problem and try out your skills on a few sample problems that demonstrate how you can use everyday reasoning in…
The Self-Ionization of Water
After examining how different substances may behave when dissolved in water, you learn about the self-ionization of water and use this knowledge to solve problems. The lecture ends with a brief introduction to the pH of solutions.
Le Chatelier—Pressure and Temperature
Having established a basic understanding of Le Chatelier's Principle, you explore how this principle plays out in a variety of situations in which an equilibrium system is changed.
Writing and Balancing Chemical Equations
What happens when you combine two or more elements? Through a variety of practice problems, you learn to identify when a chemical reaction has occurred, how to write chemical equations, and how to "balance" equations to conserve the atoms.
Titration Curves and Indicators
Acid-base indicators, which change color when a solution switches from acid to base and back again, provide a striking demonstration of the transformation that occurs during titration. Learn how to use these indicators to determine the equivalence point of a titration, and examine what happens when you graph these reactions.
Chemical Energy, Biomass, and Photosynthesis
Episode 5 of The Science of Energy
Turn now to chemical energy, the potential energy resulting from the position of atoms within molecules. After an overview of photosynthesis (perhaps the universe's most amazing form of energy conversion), learn how combustion transforms biofuels into light and heat, and how energy density affects the transportation of biofuels like petroleum.
Energy - Forms and Conversion for Use
Episode 2 of The Science of Energy
Energy is a fundamental part of our universe--in a sense, the universe is energy. Here, Professor Wysession introduces you to the many fascinating forms energy takes, including potential, kinetic, mechanical, and thermal energy. He also explains how energy is measured to make you more fluent in "energy-speak" for the coming…