Calorimetry & Enthalpy Explained | Exothermic vs Endothermic | Chemistry Shorts

Ajouté : 2026-06-01

[00:00:00]Calorimetry.

[00:00:02]Energy changes occurring in physical [music] and chemical processes can be measured experimentally by a technical method called calorimetry.

[00:00:10]In calorimetry method, the process [music] is carried out in a vessel called calorimeter.

[00:00:17]Enthalpy, [music] H.

[00:00:19]If total energy is added with product of pressure and volume, [music] it is called enthalpy.

[00:00:25]Delta H is equal to U plus PV. [music] Q sub P is equal to H2 minus H1. That is equal to delta H.

[00:00:34]At [music] constant pressure, delta H is equal to delta U plus P delta V.

[00:00:40]For exothermic reactions, delta H value is given negative sign.

[00:00:44]In these reactions, heat is liberated.

[00:00:47]>> [music] >> If the system participating in reaction absorbs heat from surroundings, that reaction is called endothermic reaction.

[00:00:54]For endothermic reaction, delta H value is positive.

[00:00:58]>> [music]