Coffee Cup Calorimeter - Calculate Enthalpy Change, Constant Pressure Calorimetry

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Coffee Cup Calorimeter - Calculate Enthalpy Change, Constant Pressure Calorimetry

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The Organic Chemistry Tutor

Күн бұрын

Пікірлер: 66

@TheOrganicChemistryTutor 7 ай бұрын

Final Exams and Video Playlists: www.video-tutor.net/

@breannepoernbacher7599 3 жыл бұрын

Imagine enrolling into zoom university for 10k a year and they cannot even properly teach you coffee cup calorimetry :,)

@navidaabdullahi1693 2 жыл бұрын

im in normal college for 22k a year

@bentack33 2 жыл бұрын

Here in high school taking AP chem, we do one probably and teachers goes, alright I hope you got it!

@joesmittington1207 2 жыл бұрын

dude just go to Community college, here in florida panhandle its 3k a year

@noorhanraad2708 2 жыл бұрын

I am literally watching your videos about 24 hours before my final chemistry exam! Thanks your videos help a lot!

@kwanelemakhobotlela7536 Жыл бұрын

did you pass ?

@toastycrystaleclxpse3423 4 ай бұрын

@@kwanelemakhobotlela7536 Only three of us passed in the entire class...

@georgesadler7830 3 ай бұрын

Professor Organic Chemistry Tutor, thank you for a step by step analysis of the classical Coffee Cup Calorimeter Problem in AP/General Chemistry. Although this material is simple to follow and understand from start to finish, solving word problems is problematic in Science and Engineering.

@owenzhang9586 5 ай бұрын

This guy is single handedly carrying me through high school

@sciencenature787 7 жыл бұрын

Your videos help me a lot in my jee preparation in India.Thank you.

@divinephanes 3 жыл бұрын

one question, how do you calculate the specific heat capacity of a 1M solution? Is it different than calculating a normal solution?

@jareddemke4031 4 жыл бұрын

Thanks so much! this was really helpful!

@secondbelarus 5 жыл бұрын

Dear O-tutor, here is the catch on 7:15 - why is the mass 250g (only water)? Should have been 265g solution = 15g solute + 250g solvent. It is the united system with the specific heat capacity assumed to be 4.184, and the density 1.00, and its temp rises. Am I right?

@maggiestorti656 5 жыл бұрын

this is what i did! because the solution is a mixture of both the CaCl2 and water! My answer was 86.13 kj/mol

@Ceecee384 5 жыл бұрын

@@maggiestorti656 So....do we leave out the 15g of solute or include it with mass? I have a final coming up and would like to get this question right.

@maggiestorti656 5 жыл бұрын

C With2Es I’m pretty sure we add it to the 250g!

@secondbelarus 4 жыл бұрын

@@nazuzun5803 OK.

@markwang7480 2 жыл бұрын

i dont think so because that equation is only for Qh2o, which means to use the mass of h2o by itself

@gabrielwilson6484 4 жыл бұрын

NES chemistry tests have you add in the 15g of CaCl2 to the q of the rxn in order to get these problems right. Are there 2 ways of doing these problems?...

@norhayatimi 3 жыл бұрын

Some of the solution for coffee cup calorimeter, they sum up the mass of water and the reactant. It is true or wrong?

@greatsis5453 3 жыл бұрын

You explain is fabulous thank you so much

@DivineSeaDragon 4 жыл бұрын

Bless your soul friend

@shellychrisman1901 6 жыл бұрын

At 5:08, why is q Rxn = -q H2O? I thought if the temp. of the solution went up, then H2O was absorbing heat, and was therefore (+)? Calorimetry problems severely confuse me for some reason, but your videos have been very helpful so far. Just want to make sure I'm understanding this correctly. Thank you!!!

@shellychrisman1901 6 жыл бұрын

is that just a general formula showing that there must be a negative sign in order for them to be equal?

@Pal0maSama 6 жыл бұрын

Yes, there must be a negative sign to make them equal. You can put the negative sign on either side of the equation.

@KomicWorld 4 жыл бұрын

From the system’s perspective, the CaCl2 is losing heat, so (-), while the water is gaining heat, so (+). It gets very confusing because you have to grapple with the system’s perspective and the surrounding’s perspective. Hope that helps

@guts2662 Жыл бұрын

@@Pal0maSama so qrxn is for the compound only?

@fibonacci3138 Жыл бұрын

OML, this is amazing, thank you so so so so so ossoosososoos much!

@alexandervarady5326 4 ай бұрын

why some times the mass needs to be added with the substance and other times we just use water mass?

@costcoman408 5 ай бұрын

why is qh2o negative? the qrxn is losing heat so shouldn't it be negative and qh2o positive? or does it not matter.

@sadprincess4435 7 ай бұрын

One thing I don't get is that are q solution and q reaction the same? Or q solution and q calorimeter are the same

@leeday5830 2 жыл бұрын

in the equation q= mcT ,for m, do we use only the mass of water or the total mass?

@bcefghijklm 2 жыл бұрын

i think it should be the total mass so m= mass of H2O + mass of substance

@noblevenom2858 7 ай бұрын

yea he did that wrong. it is supposed to be the total mass, not just the mass of the water

@m_nandha_krishnan6343 3 жыл бұрын

It is answer for change in internal energy not enthalpy ..

@ChizzyBeeClassic 5 жыл бұрын

Well explained. Thank you

@KZ-sq3ou Жыл бұрын

What if we have multiple reagents with a limiting reagent

@joshiifruit5554 Жыл бұрын

thank you.

@brianreyes5831 3 жыл бұрын

Is there a derivation for q = mC(delta T)

@banzilwillienwyethi.270 3 жыл бұрын

if the mass of the water is not given, how can i determine it?

@banzilwillienwyethi.270 3 жыл бұрын

@Jennifer Brown anything about the water is not given, but dont worry i already know it

@squanchmastersquanch4376 6 жыл бұрын

Bruhhhh. U shouldve gave the density in the first place. Over all it was a good video.

@alexreynoso5014 4 жыл бұрын

agree. Makes it so you have to be walked through the question. Not allowing you to get a change to do it first on your own.

@btcmoon6058 4 жыл бұрын

you are a god

@swe679 5 жыл бұрын

So are these coffee cup calorimeter problems always going to - ( exothermic )? since the formula has a - on one side

@Max-jm6md 4 жыл бұрын

Some solids will result in exothermic reactions, and some in endothermic (such as NaCl). Exothermic reactions result in -ΔH since the reaction is giving off heat, therefore losing that energy.

@beetlejuice4707 4 жыл бұрын

@@Max-jm6md so endothermic reactions will give positive answers?

@hannahmacintosh1123 4 жыл бұрын

Does he have any videos on calorimeter constant

@keremtaflanoglu 9 ай бұрын

idk

@whyhatholman3783 4 жыл бұрын

The video was very helpful but there where no sigfigs.

@colanseivanp.3157 2 жыл бұрын

How do you get a 4.184??

@Magnetshroom Жыл бұрын

It is the specific heat of Water H2O.

@AlecIula 2 ай бұрын

surroundins

@aaronalvarez3759 Жыл бұрын

4:10

@jenoh2804 2 ай бұрын

i love you

@NoorNoor-pf5id 2 жыл бұрын

It took u 10 mins to do this and my professor gives us 10 questions in 30 mins ☹️☹️

@Violetvixen789 4 жыл бұрын

why dont you ever sigfig?

@ryanperez8179 2 жыл бұрын

Come unto me, all ye that labour and are heavy laden, and I will give you rest. Matthew 11:28 KJV Jesus lives Jesus Christ is Lord For all have sinned, and come short of the glory of God; Romans 3:23 KJV Jesus loves you repent You're a sinner in need of a Savior That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. Romans 10:9-10 KJV