For each trial, enter the amount of heat gained by the chemical system of ammonium nitrate, qrxn. The specific heat of water is 4.184 J/goC. Report your answer using 4 digits.
The information given is:
Trial # Tiwater Tf Masswater
#1: 21.2 10.8 24.990
#2: 20.8 9.50 25.000
#3: 20.9 9.20 25.010
The equation needed is qrxn = -(qwater+qcalorimeter) I found the qwater, but I need help finding the qcalorimeter so I can determine the qrxn. Please help!
Well, this is a really late post lol. But to find the qcalorimeter, you must use the equation...
qcalorimeter = Csp + (delta)T
(delta)T is the same as what you used for qwater
Csp -> you calculated this earlier in lab. "average heat capacity of the calorimeter"
Hope this helps for yall chem kids out there. Anyone from UC Davis Summer session 2 Chem 2b 2011 with Don Land, let me know this helped haha! my names matt stange.
Qcal= CSP * (delta)T
THANKS MATT! I'm in your class too! haha, this totally helped. haha
To find the value of qcalorimeter, we need to use the equation:
qrxn = -(qwater + qcalorimeter)
We have already found the value of qwater, so now we need to find qcalorimeter.
The equation for qcalorimeter is given as:
qcalorimeter = Ccalorimeter * ΔTcalorimeter
Here, Ccalorimeter is the calorimeter constant, and ΔTcalorimeter is the change in temperature of the calorimeter.
To calculate ΔTcalorimeter, we can use the following formula:
ΔTcalorimeter = Tf - Ti
Let's calculate qcalorimeter step by step for each trial:
1. Trial #1:
Tiwater = 21.2 oC
Tf = 10.8 oC
ΔTcalorimeter = Tf - Ti = 10.8 - 21.2 = -10.4
Now, we need the calorimeter constant (Ccalorimeter), which is not provided in the given information. Please provide the value of Ccalorimeter to proceed.
2. Trial #2:
Tiwater = 20.8 oC
Tf = 9.50 oC
ΔTcalorimeter = Tf - Ti = 9.50 - 20.8 = -11.3
Again, we need the calorimeter constant (Ccalorimeter) to continue.
3. Trial #3:
Tiwater = 20.9 oC
Tf = 9.20 oC
ΔTcalorimeter = Tf - Ti = 9.20 - 20.9 = -11.7
Once more, we require the calorimeter constant (Ccalorimeter) to proceed.
Please provide the value of the calorimeter constant (Ccalorimeter) so that we can calculate qcalorimeter and eventually find qrxn.