N. N. Gihani Chiranthika Hello.. you need to calculate the area under the curve for melting temperature peak. You can do that in Origin software (via deconvolution or peak integration) or via TA instruments software where you can open the raw file directly and there is an option to calculate the area under the curve, you just have to select the end points.

Hope this helps.

Thank you very much Akanksha Adaval. I will try that way.

Hello.

I agree with the answer given by Akanksha Adaval with one addition.

The change in enthalpy equals the change in heat content when performed under constant pressure, such as with an open pan or a closed pan with pinhole(s) in the lid. In that case, your heat vs. temperature data is equals dH/dT vs. the temperature, which can be integrated using software or even by a trapezoid rule. If you did the study with a closed pan, the data do not strictly equal dH/dT but the calculation will still give a good approximation if you are dealing with a liquid or solid with limited expansion. (You would just need to note this in any reporting.)

Good luck!

The kind of transition is not specified (melting? other phase change? reaction?). For a reaction, the kinetic aspect may be important. I'd like to add to the answers above that you need to calibrate your instrument with a standard with known enthalpy change (of fusion for example, indium is frequently used.)

Thank you very much Robert A Bellantone and Jean-François Gal for your explanations.

As already stated by others, you first have to calibrate your instrument with a standard to get the K parameter, a specific constant multiplier that gives you the proportion between the area A under the peak and the transition enthalpy DH. Then, you will simply apply the rule: DH=KA

Thank you very much Antonella Battisti