Question

What is the Heat capacity of the calorimeter?
Concentration of NaOH - 1M
Initial Ti of HCl - 22.2
Initial Ti of NaOH - 27.9
Tf – 27.9
HCl – 50 mL - 1M
NaOH – 50 mL - 1M
Flask – 125 mL
qsystem = -qsurroundings
qrxn = -(qcalorimeter +qwater from acid sln + qwater from base sln)
qrxn = - (mcTcal + mcTacid +mcTbase)
-58400 = - [(125g)(5.7)c + (60g)(4.184)(5.7) + (106.5)(4.184)(5.7)
* mass found by using density x volume used
I'm not sure if I am plugging in the right values into the equation. Any help is greatly appreciated!

Answer 1

Oh forgot to add that I'm also confused what to use for the mass of the calorimeter as well. We used a 125mL erlenmeyer flask but I don't think it's right.

Answer 2

Heat capacity. That using formula q=mcT?

Answer 3

Yes but it's telling me to use \[-qrxn = -n DeltaH = Ccal * DeltaT + Cv * Vacid * DeltaTacid + Cv * Vbase * DeltaTbase\]

Answer 4

Sorry, I don't recognize it directly, but that works as well? What's the problem? Looks like plug and play to me, although I didn't fully read the question?

Answer 5

Yah i plugged and played with it but I'm not really sure if i'm actually using the correct values as some of the values don't seem reasonable to me like the mass of the flask( used a 125 mL flask)

Answer 6

this a lab?

Answer 7

you dont use mass of the flask, mass of container is irelevant, you need to use mass of what you put in calorimeter, in this case acid and base...

Answer 8

woot competency

Answer 9

Aha yah figured it out! Read something incorrectly how stupid of me ): Thanks:for the help though :D