CBSE Class 11-science Chemistry Thermodynamics
Introduction to Thermodynamics
State function depends on the state of the system and not on the path. The first law of thermodynamics states that the energy of the universe is constant.
Measurement of dU and dH
Heat change associated with chemical reactions can be measured using a calorimeter.
In Exothermic reactions energy is released and in endothermic reactions energy is absorbed.
By Hess's law heat evolved or absorbed in a chemical reaction is same whether the reaction takes place in a single step or follows a series of steps.
Ionisation enthalpy is the enthalpy change when one mole of electrons is removed from one mole of gaseous atoms under standard conditions.
Born Haber helps calculating lattice enthalpy.
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