Saturday, March 21, 2020

Brain Gym; Exercises

Brain Gym; Exercises Brain Gym exercises are exercises designed to help the brain function better during the learning process. As such, you can think of Brain Gym exercises as part of the overall theory of multiple intelligence. These exercises are based on the idea that simple physical exercise helps blood flow to the brain and can help improve the learning process by making sure the brain stays alert. Students can use these simple exercises on their own, and teachers can use them in class to help keep energy levels up throughout the day. These simple exercises are based on the copyrighted work of Paul E. Dennison, Ph.D., and Gail E. Dennison. Brain Gym  is a registered trademark of Brain Gym  International. I first encountered Brain Gym in Smart Moves, a best-selling book written by Carla Hannaford, Ph.D. Dr. Hannaford states that our bodies are very much a part of all our learning, and learning is not an isolated brain function. Every nerve and cell is a network contributing to our intelligence and our learning capability. Many educators have found this work quite helpful in improving overall concentration in class. Introduced here, you will find four basic Brain Gym exercises which implement the ideas developed in Smart Moves and can be used quickly in any classroom. Below is a series of movements called PACE. They are surprisingly simple, but very effective! Everyone has a unique PACE and these activities will help both teacher and student become positive, active, clear and energetic for learning. For colorful, fun PACE and Brain Gym ® supplies contact the Edu-Kinesthetics on-line bookstore at Braingym. Drink Water As Carla Hannaford says, Water comprises more of the brain (with estimates of 90%) than of any other organ of the body. Having students drink some water before and during class can help grease the wheel. Drinking water is very important before any stressful situation - tests! - as we tend to perspire under stress, and de-hydration can effect our concentration negatively. Brain Buttons Put one hand so that there is as wide a space as possible between the thumb and index finger.Place your index and thumb into the slight indentations below the collar bone on each side of the sternum. Press lightly in a pulsing manner.At the same time put the other hand over the navel area of the stomach. Gently press on these points for about 2 minutes. Cross Crawl Stand or sit. Put the right hand across the body to the left knee as you raise it, and then do the same thing for the left hand on the right knee just as if you were marching.Just do this either sitting or standing for about 2 minutes. Hook Ups Stand or sit. Cross the right leg over the left at the ankles.Take your right wrist and cross it over the left wrist and link up the fingers so that the right wrist is on top.Bend the elbows out and gently turn the fingers in towards the body until they rest on the sternum (breast bone) in the center of the chest. Stay in this position.Keep the ankles crossed and the wrists crossed and then breathe evenly in this position for a few minutes. You will be noticeably calmer after that time. More Whole Brain Techniques and Activities Have you had any experience using whole brain, NLP, Suggestopedia, Mind Maps or the like? Would you like to know more? Join the discussion in the forum. Using Music in the Classroom Six years ago researchers reported that people scored better on a standard IQ test after listening to Mozart. You would be surprised at how much music can also help  English learners. A visual explanation of the different parts of the brain, how they work and an example ESL EFL exercise employing the specific area. The use of colored pens to help the right brain remember patterns. Each time you use the pen it reinforces the learning process. Helpful Drawing Hints A picture paints a thousand words - Easy techniques to make quick sketches that will help any artistically challenged teacher - like myself! - use drawings on the board to encourage and stimulate class discussion. Suggestopedia: Lesson Plan Introduction and  lesson plan to a concert using the suggestopedia approach to effective/affective learning.

Wednesday, March 4, 2020

Calculating Enthalpy Changes Using Hesss Law

Calculating Enthalpy Changes Using Hess's Law Hesss Law, also known as Hesss Law of Constant Heat Summation, states that the total enthalpy of a chemical reaction is the sum of the enthalpy changes for the steps of the reaction. Therefore, you can find enthalpy change by breaking a reaction into component steps that have known enthalpy values. This example problem demonstrates strategies for  how to use Hesss Law to find the enthalpy change of a reaction using enthalpy data from similar reactions. Hess's Law Enthalpy Change Problem What is the value for ΔH for the following reaction?CS2(l) 3 O2(g) → CO2(g) 2 SO2(g)Given:C(s) O2(g) → CO2(g); ΔHf -393.5 kJ/molS(s) O2(g) → SO2(g); ΔHf -296.8 kJ/molC(s) 2 S(s) → CS2(l); ΔHf 87.9 kJ/mol Solution Hesss law says the total enthalpy change does not rely on the path taken from beginning to end. Enthalpy can be calculated in one grand step or multiple smaller steps.To solve this type of problem, we need to organize the given chemical reactions where the total effect yields the reaction needed. There are a few rules that must be followed when manipulating a reaction. The reaction can be reversed. This will change the sign of ΔHf.The reaction can be multiplied by a constant. The value of ΔHf must be multiplied by the same constant.Any combination of the first two rules may be used. Finding a correct path is different for each Hesss law problem and may require some trial and error. A good place to start is to find one of the reactants or products where there is only one mole in the reaction.We need one CO2, and the first reaction has one CO2 on the product side.C(s) O2(g) → CO2(g), ΔHf -393.5 kJ/molThis gives us the CO2 we need on the product side and one of the O2 moles we need on the reactant side.To get two more O2 moles, use the second equation and multiply it by two. Remember to multiply the ΔHf by two as well.2 S(s) 2 O2(g) → 2 SO2(g), ΔHf 2(-326.8 kJ/mol)Now we have two extra S and one extra C molecule on the reactant side we dont need. The third reaction also has two S and one C on the reactant side. Reverse this reaction to bring the molecules to the product side. Remember to change the sign on ΔHf.CS2(l) → C(s) 2 S(s), ΔHf -87.9 kJ/molWhen all three reactions are added, the extra two sulfur and one extra c arbon atoms are canceled out, leaving the target reaction. All that remains is adding up the values of ΔHf.ΔH -393.5 kJ/mol 2(-296.8 kJ/mol) (-87.9 kJ/mol)ΔH -393.5 kJ/mol - 593.6 kJ/mol - 87.9 kJ/molΔH -1075.0 kJ/molAnswer:  The change in enthalpy for the reaction is -1075.0 kJ/mol. Facts About Hess's Law Hesss Law takes its name from Russian chemist and physician Germain Hess. Hess investigated thermochemistry and published his law of thermochemistry in 1840.To apply Hesss Law, all of the component steps of a chemical reaction need to occur at the same temperature.Hesss Law may be used to calculate  entropy and Gibbs energy in addition to enthalpy.