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Bond Energy Teacher Resources
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The National Chemistry Olympiad exams are comprehensive tests covering an entire year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your general chemistry class. This particular part of the three-part exam consists of 60 multiple choice questions. Read through it before assigning to make sure every question is relevant to your curriculum. As a bonus, you will find an answer key attached.
Sixty multiple-choice questions test on a variety of first year chemistry subjects. In order to succeed, exam takers must be competent with properties of elements, stoichiometry problems, gas laws, bond dissociation, and types of reactions. A page is provided that displays a comprehensive chart of abbreviations and symbols, constants, and the periodic table. Also, an answer key is provided for teachers. This is a top-notch exam!
The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to practice for the competition or to prepare for a final exam on behavior of gases, properties of metals, chemical reacitons, pH and titration curves, ionizaton energy, molecular geometry, and more!
This is a review of how advanced chemistry learners handle thermodynamics equations and calculations. Charts and graphs are included for them to read in addition to solving related problems. You will find this resource useful as a review homework or preparation for a unit quiz.
The chart that is required to answer the first question is printed on another worksheet by the same author. You could have learners find an average bond energies table in their textbooks or online if you want to use this otherwise terrific worksheet. It asks your high school chemists to calculate heat, entropy, and free energy changes for different chemical reactions.
Advanced chemistry courses typically cover organic reactions. On this reference sheet, the five types of organic reaction mechanisms are explained and an example is shown. For each, there is also a diagram of the chemical reaction that displays the movement of electron pairs from one compound to the other. Give this to chemistry learners during your lecture on the topic and let them keep it as a reference.
In this reaction mechanisms worksheet, students are given examples of various reactions that occur in organic chemistry. These examples include electrophilic substitution, nucleophilic substitution, elimination reactions, displacement reactions and free radical substitution.
Junior chemists manufacture biodiesel in the lab. In this exercise, they check the purity of the biodiesel using thin layer chromatography. They also calculate its density and heat of combustion. They are sure to rise to the challenge and also become more aware of tomorrow's technology!
Consider our energy sources: wood, coal, oil, uranium. Learners compare the pollution to energy produced for each. They practice fractional distillation of an alcohol/water mixture to simulate the process of refining crude oil. Thought-provoking questions are assigned as a follow-up to the laboratory exercise. This is an outstanding resource to add to your physical or earth science repertoire.
In this AP Chemistry learning exercise, learners apply concepts of electron configuration to accurately answer the questions provided. Students also draw Lewis structures of the given elements. Learners estimate the enthalpy of formation as well as enthalpy of sublimation.
Two versions of this handout are provided, the second with more detailed information on the same topics. Chemistry aces survey chemical reactions, heat energy transferred, and the action of enzymes by reading this resource. You can either give it to learners as a study guide, or keep it for your own use as a lecture guide. Either way, you will find it to be organized and applicable for a general chemistry course.
A more thorough PowerPoint on chemical bonds and chemical reactions would be hard to find! Through 108 slides, chemistry learners are taught about how compounds are formed, how to name them, and how to balance chemical equations. They are exposed to different types of bonds and reactions. You could show this in segments, stopping not only at the included "Check for Understanding" slides, but also to practice drawing molecular structures and balancing equations along the way.
So how does the carbon cycle work? Kids participate in a hands-on activity that allows them to understand the chemistry behind climate change and global warming. They act out the process of photosynthesis by labeling themselves as chemicals moving in and out of a plant. They form chemical bonds by linking arms to create different molecules that change from carbon dioxide to oxygen. To evaluate understanding, they respond to several prompts in writing. The concrete manner in which the topic is conveyed is great for both younger and older students.
This two-page assignment covers basic thermochemistry concepts. Chemistry learners identify exothermic and endothermic processes, explain a phase change graph, and draw an energy level diagram. There are no problems to solve, just conceptual questions and critical thinking applications. It makes a nice change of pace as chemistry homework.
Students investigate the energy released by a peanut and a piece of a walnut. In this catabolism and calories lesson plan, students burn a peanut and a piece of a walnut and measure the temperature of the water before burning and after burning the food items using the apparatus. Students also burn oil with a piece of string soaked in it and measure the change in water temperature using the same apparatus. Students calculate the calories in the peanut, walnut and oil.