Chemistry-Calorimetry

[Belgarion]

Hey guys, just some questions:

Why do you need to calibrate a calorimeter before use?

What are some sources of error when conducting a calor experiment?

Which method is more accurate: electrical calibration or hot/cold calibration

why do you have to indirectly determine enthalphy change of some experiments?


Thanks

[Tonychet2]

well for ur first question u have to calibrate the calorimeter so you know how much energy is required to raise the temperature by 1 degree celcius