Coffee Cup Calorimeter - Calculate Enthalpy Change, Constant Pressure Calorimetry

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Күн бұрын

This chemistry video tutorial explains how to calculate the enthalpy change using a coffee cup calorimeter at constant pressure. This video contains about 1 practice problem on calorimetry. The reaction is exothermic if the temperature increases and it's endothermic if the temperature decreases.
First Law of Thermodynamics:
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Thermochemistry Equations:
• Thermochemistry Equati...
Internal Energy, Heat, and Work:
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Thermochemical Equations:
• Thermochemical Equations
Specific Vs Molar Heat Capacity:
• What Is The Difference...
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Basic Calorimetry Problems:
• How To Solve Basic Cal...
Final Temperature Calorimetry Problems:
• Final Temperature Calo...
Latent Heat of Fusion & Vaporization:
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Coffee Cup Calorimeter:
• Coffee Cup Calorimeter...
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Specific Heat Capacity Problems:
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Hess Law Problems:
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Enthalpy of Formation & Heat Combustion:
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Enthalpy Practice Problems:
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Пікірлер: 66

@TheOrganicChemistryTutor 5 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 3 ай бұрын

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

@georgesadler7830 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.

@sciencenature787 6 жыл бұрын

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

@jareddemke4031 4 жыл бұрын

Thanks so much! this was really helpful!

@owenzhang9586 3 ай бұрын

This guy is single handedly carrying me through high school

@DivineSeaDragon 4 жыл бұрын

Bless your soul friend

@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?

@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?...

@greatsis5453 3 жыл бұрын

You explain is fabulous thank you so much

@ChizzyBeeClassic 4 жыл бұрын

Well explained. Thank you

@fibonacci3138 Жыл бұрын

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

@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

@norhayatimi 2 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?

@brianreyes5831 3 жыл бұрын

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

@joshiifruit5554 Жыл бұрын

thank you.

@btcmoon6058 4 жыл бұрын

you are a god

@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?

@alexandervarady5326 2 ай бұрын

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

@sadprincess4435 5 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

@m_nandha_krishnan6343 3 жыл бұрын

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

@costcoman408 3 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.

@KZ-sq3ou Жыл бұрын

What if we have multiple reagents with a limiting reagent

@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 5 ай бұрын

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

@hannahmacintosh1123 4 жыл бұрын

Does he have any videos on calorimeter constant

@keremtaflanoglu 7 ай бұрын

idk

@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.

@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 3 жыл бұрын

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

@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.

@aaronalvarez3759 Жыл бұрын

4:10

@NoorNoor-pf5id 2 жыл бұрын

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

@AlecIula 22 күн бұрын

surroundins

@jenoh2804 9 күн бұрын

i love you

@medicalquizbank1 3 жыл бұрын

Drop Your cashapp bro!!!!

@Violetvixen789 4 жыл бұрын

why dont you ever sigfig?

@justinquilnet4087 4 жыл бұрын

how did you know C was = 4.184

@orehit3980 4 жыл бұрын

Justin Quilnet thats the specific heat of water for me i got it from my textbook but you can also just google it

@VinylUnboxings 4 жыл бұрын

It will be provided on quizzes typically, unless your teacher told you to memorize some specific ones.

@databomb404 3 жыл бұрын

@@orehit3980 can you send me your textbook on conquerjee101@gmail.com thank u

@ryanperez8179 2 жыл бұрын

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