[DQD]

I have one experiment about it
510 ml water and 5.00g KCl to calculate specific heat (with Q dissolving = Q_dis = 4.17 kcal/mol)
Using Beckmann Thermometer for measuring (delta)T
I use it for equation: C = - n*Q_dis/(delta)T

And the question is:
In 3 factor:
- weighing chemical
- the insulating of calorimeter
- way to finding (delta)T
which factor affect the experiment most ? Explain ?

Thanks

[fledarmus]

Try just throwing some numbers at the problem - how big an error might you have in weighing out your compound? If your number was that far off, how much would it change your result? And so forth.

This BFAI (brute force and ignorance) technique works fine if all you are interested in is relative magnitudes of errors. If you need a specific error measurement, you will need to hit the problem with some statistics.

[DQD]

as KCl is hygroscopic, so weighing out chemical affect to accuracy measurement