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11/28/18

Added Nov 28, 2018 •

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today we're going to be talking about chemical reactions you're actually going to have 3 no papers tomorrow. make sure your first name last Thursday she is also today or you need to give to the Sun make sure your first name last name and block if you don't have it today or tomorrow reactions now that you seen how absolutely beautiful reactions to let's talk about the different parts of chemical reactions to the first thing that you're going to need is your nose and it's the sheet that has a foldable on it and what I want you to do along the outside and then so it's the solid line on solid do not cut on dotted line so cut on the solid and then you're going to fold on the dotted line so he what the three Flats foldable like this and I know it's backwards because of my camera but it's reacting Aero Products so it's remember the three parts of a chemical reaction is remember reactor arrow and products or on your phone while at the bottom is a little extra space and that's where you're going to type these nuts a chemical equation the formula for chemical reaction for bonds are formed or broken with the gain or release three parts so open up I want you to write what formulas are the reactants of this formula RNA which is sodium + CL just chlorine and I want you to that reactants are the starting materials there before reaction occurs Now open up the arrow flap on the top of the flap you need to write a capital A and draw your arrow and then on the bottom you right there oh the chemical change or chemical reaction Now open up the pee flap for the product flap so here I want you to write NaCl which is table salt in this is the product the element or compound exist after the chemical reaction the reactants are your ingredient start with you either store energy or release is what you end up with the Antics final products it's right now. He's got this she need to put first and last name block on the back and you know get this to the stop now you're going to want to get your Andis armik exothermic notes out about the different parts of chemical reactions are second thing of note is the two major types chemical reactions in those are endothermic and exothermic and they all have to do with heat you're going to need before we get started first of all heat is the energy that moving pod purple top temperature is a measure of how fast molecules are moving like a pedometer reactants or the initial substances present before a reaction occurs and products are the final substances present after area react it Aero Products question what are the two types of energy flow will first of all you have and then you have excess on it means inside outside outside America's heat to think cheat on the outside so exoskeleton like the skeleton that's found on a crab of crab where is it still turn on the outside set important note there's no such thing as cold he's ever saw about it really cold is the lack of he so he always moves from more places to cooler places so when you hold an ice cube into the ice ice is robbing you of so it feels cold does energy flow energy can flow in two ways it can be where energy is absorbed by the reaction system from the surroundings or exothermic energy is transferred from the reaction system to the surroundings still inside that means traveling inside exothermic exit its leaving what's happening on a molecular level endothermic Reactions where reactants Arrow product this means that loss of energy is being used for breaking Bond but not for speeding up the movement of particles to the temperature of the reaction draw so what is we are breaking Bond and then the temperature start to drop lots of energy is being released when the new bond forms the particles and the temperature of the reaction goes up so it's really sing the heat if he is going for when you feel that heat so what are some real life examples of endothermic reaction or cold packs and we're going to say that in lab on Thursday also when you make things such as you boil cooking process is it endothermic reaction that he is going from the outside into the food photosynthesis is an endothermic reaction the heat from the Sun is going how to make your tongue feel cool because it's going in some real life examples of exothermic fireworks think about the big explosion the big it's for leasing things and you don't want to get close to fireworks cuz they're on fire burning rocket fuel hand warmer the gamma we're going to experience the lab later on this week and water vapor gas condensing to liquid water on a window what is this look on a graph thermic you start here and you have a little bit and the energy needs to be absorbed the process needs to take in heat so you have a little bit you're using it using it using it using it alright so what's happening here is the reactant actually have less Naproxen Cermak is the exact opposite the reactive start with a lot of energy and you put them together to make these bonds and a products don't have as much so energy is released in the form of the chemical reaction with are called that blank in the chemicals you have at the end action are called blank make sure you're putting your answers in the blank heading outside in the winter to play in a snow storm and you leave the door open your brother yelled at you shut the door scientifically correct come back for your brother remember there's no such thing is called endothermic or exothermic a student makes a volcano with baking soda and vinegar in a lava Fields holes so the end or EXO that's all it burns brightly and releases heat light and sound again indoor XO liquid water becomes ice after sitting in the freezer or XO two chemicals will only react if you heat them continually or XO Energy for is this endothermic or exothermic you're not going to do $2 summary today you can exit out of those that's it for Note Paper number two or number first and turn it into the side of your now ready to start with. where does all this stuff come from is rock that cow your heart. The things themselves mind you but what they're made of the atoms that are the fabric of all things question look to the law of conservation of mass this law says take an isolated system defined by a boundary that matter and energy cannot cross inside this system mass AKA matter and energy can neither be created nor destroyed the universe to the best of our knowledge is an isolated system but before we get to that let's look at a much smaller and simple one can we have six carbon atoms 12 hydrogen atoms 18 oxygen atoms with a little energy are molecules going to really get moving these atoms can bond together to form familiar molecules ears water and carbon dioxide we should create or destroy Mass you're stuck with what we've got so what can we do they have a mind of their own let's see they formed more carbon dioxide and water 6 of each add a little energy and we can get them to reshuffle themselves to a simple sugar and some oxygen gas our atoms are all accounted for six carbon 12 hydrogen and 18 oxygen the energy we applied is now stored in the bonds between atoms we can release that energy by breaking that sugar back into water and carbon dioxide and still same Adams let's put a few of our Adams aside and try something a little more explosive this year is methane most commonly associated with cow flatulence but also you Rocket Fuel if we add some oxygen and a little bit of energy like you might get from a lit match they can bust into carbon dioxide water and even more energy notice our methane started with four hydrogen at at the we still have for hydrogen captured in two water molecules for a grand finale here's propane another combustible gas we had oxygen light it up and boom more water and carbon dioxide list we get three CO2 is because the propane molecule started with three carbon atoms and they have nowhere else to go there are many other reactions we can model with this small set of atoms and the law of conservation of mass always holds true whatever matter and energy go into a chemical reaction are present and accounted for when it's complete first of all you need to remember that chemical reaction conservation so whatever you in the other side reaction chemical formulas and equations let's talk about the difference between what's Scripps balancing chemical equations the first step even though it doesn't say it is also afraid and the reactants Denton County oxygen oxygen is not the formula with the Alabama and adjuster this is now. how many reactant side to change the coefficient of one of the what changes are number one we don't have to put A1 in the Box because they wanted understood you just because what's the next one we have to get on the reactant let's change the product side please come to the office permanently have the correct number not hydrogen separate there is one part on the rock we changed looking for laugh what you need to do the back whatever you don't get done in class we will finish tomorrow make sure you turn everything into the sun I love you see you tomorrow

Uploaded by Carmen Harper.

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11/28/18

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