The Differential Scanning Calorimetry (DSC) can be used to measure the heat capacity of material systems, as well as the change of enthalpy (ΔΗ) for dramatic phase transformation processes, chemical reactions, ionizations, dissolutions in solvents, vacancy formation, and so on.
The standard enthalpy of formation is defined as the change in enthalpy, when 1 mole of a substance in the standard state are formed from elemental constituents in their stable states.
Method for Sample Measurement:
Polish the sample surfaces. Place the flattest sample surface facing the bottom of the pan. Use an optimal sample size that fits the pan, without touching the lid. The sample is finely polished to obtain good thermal contact with the sample pan, so the temperature can be accurately determined and the data is less noisy.
Measure the sample mass accurately.
Open the measuring unit after the furnace has cooled down.
Remove the standard sample from the crucible.
Clean the crucible using alcohol. Insert the sample to be measured in the crucible replacing the standard.
Follow step 3 to measure the sample. The measurement conditions (e.g. heating rate, gases, type of crucible) for the baseline measurement and the subsequent standard and sample measurement must be the same.
The Differential Scanning Calorimetry (DSC) can be used to measure the heat capacity of material systems, as well as the change of enthalpy (ΔΗ) for dramatic phase transformation processes, chemical reactions, ionizations, dissolutions in solvents, vacancy formation, and so on.
The standard enthalpy of formation is defined as the change in enthalpy, when 1 mole of a substance in the standard state are formed from elemental constituents in their stable states.
Method for Sample Measurement:
Polish the sample surfaces. Place the flattest sample surface facing the bottom of the pan. Use an optimal sample size that fits the pan, without touching the lid. The sample is finely polished to obtain good thermal contact with the sample pan, so the temperature can be accurately determined and the data is less noisy.
Measure the sample mass accurately.
Open the measuring unit after the furnace has cooled down.
Remove the standard sample from the crucible.
Clean the crucible using alcohol. Insert the sample to be measured in the crucible replacing the standard.
Follow step 3 to measure the sample. The measurement conditions (e.g. heating rate, gases, type of crucible) for the baseline measurement and the subsequent standard and sample measurement must be the same.