Hi,
I am trying to do a prelab and I am really stuck... I have no idea how to go about this, I don't knwo if its worded funny or waht, so any help would be greatly apprecaited. The question is:
(This is for a bomb calorimeter of constant volume)
Benzoic acid is often used to calibrate calorimeters as its thermodynamic properties have been well characterized. The change in inter energy upon combusting benzoic acid is DeltaU 25degrees = -26.43kJ/g. (If T1 is within a few degrees of 25 degrees then the difference between deltaU and deltaU 25 degrees is negliglblie). Use the data below to calculate the calorimeter constant C. Remember to include a correction for the heat produced in combusting the fuse wire. The heat equivalent for the combustion of fuse wire is -9.6 J/cm.
Benzoic acid= 0.7386g
Fuse wire consumed = 7.2cm
Chnage in temp = 1.940 degrees C
I know that the equations for constant volume are work = 0, delta U = (Cv)deltaT, deltaU=Q=CdeltaT, deltaU(total)=deltaU(fusewire) + deltaU(sample)
I just don't know waht to do and how this gives me anything to solve it with. Thanks for taking the time to read this.
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1 answer