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Assertion:Born-Haber cycle is based on Hess's law. Reason: Lattice enthalpy can be calculated by Born-Haber cycle

Answer»

If both assertion and REASON are true and the reason is the correct explanation of the assertion
if both assertion and reason are true but reason is not the correct explanation of the assertion
if assertion is true but reason is false
if the assertion and reason both are false

Solution :Hess's law states that the enthalpy of a reaction is the same, whether it TAKES place in a single step or in more than one step. In born haber cycle the formation of an combination of the element or by a STEPWISE process involving VAPORIZATION of elements, conversions process gaseous atoms into ions & the combination of the gaseous ions to form the ionic solid .


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