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Tell me why??? When heat is absorbed or emitted by the system at constant pressure,we are actually measuring the change in enthalpy i.e dH=q p PLEASE EXPLAIN WITH PROPER REASON...

Tell me why???
When heat is absorbed or emitted by the system at constant pressure,we are actually measuring the change in enthalpy i.e dH=qp
 
PLEASE EXPLAIN WITH PROPER REASON...

Grade:11

1 Answers

Harishwar IIT Roorkee
askIITians Faculty 50 Points
9 years ago
Enthalpy as being the heat transferred during a constant pressure process. Enthalpy is a very important concept in thermochemistry for the following reasons:Most reactions occur under constant pressure conditions (i.e. rxn’s in open containers such as test tubes and beakers, rxn’s that take place in biological systems, etc.).
Many reactions do not involve gaseous reactants or products, as a consequence there is very little work associated with the reaction and DE ~ DH.

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