#godalert

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good lord

How To Hess's Law for godalert (Nat)

The above photo is an example that I pulled from the internet because my handwriting is AWFUL 

Hess's law states that the Enthalpy change (basically to total heat of a reaction) of Delta (triangle) H for a reaction depends on the INITIAL and FINAL conditions, not the path taken. TRANSLATION: DO WHATEVER YOU NEED TO, YOU CAN'T BE MARKED OFF FOR HOW YOU DO IT JUST THE FINAL ANSWER *Chem angels are sing rn*

basically the three equations above are how the top equation got to where it is and it took three separate reactions to do it, each gave off it's own temperature.

GOAL: ADD ALL OF THE THREE EQUATIONS UP TO GET THE FINAL EQUATION GIVEN IN THE QUESTION

Basically you are balancing three equations

now the how to where you can DO WHATEVER YOU WANT IN ANY ORDER THIS IS SO HELPFUL

STEPS

1) curse Chemistry because it SUCKS

2) look at the three equations. draw a line under them and write the final so you can remember what you need to get to

3) FLIPPING TIME: some of the equations need to be flipped so you can get some of the chemicals on the right side (Reactants or products side) the given equation has none. say if you needed Hydrogen on the reactants side, you would have to flip that single equation that has hydrogen. but here is the kicker IF YOU FLIP ON EQUATION YOU MUST FLIP THE SIGN ON THE HEAT THAT CORRESPONDS WITH IT. THIS IS BECAUSE THE REACTION IS MOVING BACKWARDS AND DOING THE OPPOSITE. MUCHO IMPORTANTE.

4) GET RID OF THE EXCESS: obviously if you added these like a normal math problem  you you have an equation that stretched on for miles. so if there is a compound existing in the three equations that is not in the Final you must cross it out, you can cross it out using algebra. Looks at CO2 in the first and second eqautions. It does not need to be there so it must go. leave CO2. You can only cross out compounds if they have the SAME DENOMINATOR (4) and are on OPPOSITE sides (one in reactants and one in products so they cancel out). If they do not have the same denominator (say if one CO2 had a deniminator of 2 and another had 4) then you can multiply one equation by a number to get 4. In the picture, they did that. now CO2 is gone. yay. if a denominator needs to be cut in half (CO2 has returned from the dead and it is again 4 CO2 and 2 CO2) you can always multiply the 4 by 1/2. BUT YOU HAVE TO MULTIPLY 1/2 TO ALL OF THE COMPOUNDS IN THAT LINE OF THE EQUATION

             BUT WHAT IF BOTH CO2s WERE BOTH ON THE REACTANTS SIDE?? then you will have to flip one of them. I know it's a process. but here is a tip that might save the world: IF YOU A MULTIPLY THE EQUATION THEN NOTE IT NEXT THE THE HEAT FOR THAT EQUATION (they did it but writing the little x2) BECAUSE YOU NEED TO ADD UP ALL OF THE HEAT IN THE END

5) TAKE A DEEP BREATH FRIEND YOU ARE DOING GREAT

6) you basically have to keep flipping and multiplying till you get rid of everything. 

7) YOU HAVE BALANCED ALL OF THE EQUATION, NOW WHAT?? now you have to add up all of the heat. this is what the teacher is looking for. this is also where your notes on the side come in handy. add up the three heat temperatures. if you multiplied and equation by 2 then you multiply that specific heat by 2. if you flipped an equation then you change the positive or negative sign to the opposite. EX.) the answer to the total heat in the equation is -1,547. it gave off heat (negative) so it is exothermic 

8) throw down your pencil because you are a winner

SIDE NOTE: on your blog it says our guessing from the American school system a sophomore or a freshman. I'm from the northeast american school system and I'm a junior in AP CHEM and I just learned this. you should not be learning this, save yourself from this horror sweetie.

ALSO youtube is so helpful for chem because it is hard so we all pull together to help

 https://www.youtube.com/watch?v=_NLAgSnqNOE 

https://www.youtube.com/watch?v=8m_FCe5aCqY THIS GUY IS AN ANGEL WATCH IS VIDEOS HE DOES LIKE EVERYTHING I THINK HE HAS HESS'S LAW BUT IDK BUT HE IS GOOD WITH EVERYTHING 

https://www.youtube.com/watch?v=NQaxQBTdOwE AN ACTUAL TEACHER

https://www.youtube.com/watch?v=p898BLj6SXI SO HIGHLY RECOMMEND THESE ARE PODCASTS TO TWO CHEM TEACHERS WHO GO THROUGH POWERPOINTS AND TEACH YOU WITH SO MANY EXAMPLES AND TELL JOKES

sorry this took so long. good luck! *hugs* 

I like the first one better :)

7. Would you rather be attacked by a big bear or a swarm of bees?

I think id go with a bear.. But in a car you know so I can get the hell out of there

20. Do you still watch cartoons?

Uh yeah and I can paint with all the colours of the wind

26. What movies could you watch over and over and still love?

I don't think I'll ever tire of Disney movies tbh (also Camp Takota)