IGNOU BCHCT 133 2026 - Differentiate between enthalpy driven and entropy driven reactions wit

Question

Differentiate between enthalpy driven and entropy driven reactions with the help of suitable examples.

19 Jan 2026

Answer :

Word Count : 265

Enthalpy-driven reactions are chemical reactions in which the primary factor determining spontaneity is the change in enthalpy (ΔH). These reactions are usually exothermic, meaning they release heat to the surroundings, resulting in a negative ΔH. The release of energy makes the process thermodynamically favorable even if the disorder of the system does not increase significantly. A classic example of an enthalpy-driven reaction is the formation of water from hydrogen and oxygen: [ 2H_2(g) + O_2(g) \rightarrow 2H_2O(l) ] This reaction releases a large amount of heat (ΔH < 0), making

_____ ________ __________ _________ ____ _________.
___ _____ _______ _____ ___ ____.
_______ _________ _________ ________ ______ _________ ________.
_________ ___ ___ _______ __________.
_____ ____ ______ _______ _____.
________ ___ ____ __________ _________ _______ ______ _______ _______ ____.
________ ________ ___ _____ __________ _______ ______ ___ ________ __________.
___ __________ _______ ____ ___ ____ __________.
______ _______ ______ ____ ___ __________ ___ _____ ____ __________.
_____ _________ _______ ____ ___ ______ __________ ___ __________.
___ ___ ________ _______ _________ _____.
___ __________ ____ ____ ___ ________ _________ ________.
_____ ____ _________ _______ ______ ____ _________ ________.
____ __________ ________ _____ __________.
_______ ___ ______ _____ _________ __________ _______ _______ __________ ____.
_____ _______ __________ ___ _________.
______ ___ _______ ________ _____ _________ __________.
_____ _______ __________ __________ _______ ______ _________ ________ ____.
________ _____ ____ __________ ____.
_____ _________ ___ ___ _____ ___ _____ _________ ________ __________ _____ __________.
_______ _________ ___ _____ _______ ________ _______ _________ __________ _____ _________ ____.
______ ________ ________ _______ ______ ______.
_________ ________ ____ ___ ___ _________.
_________.

IGNOU ACADEMY

Your IGNOU journey, made easier.

Solved Assignments
Study Notes
Guess Papers
Question Papers

Call Us WhatsApp

STUDY • PREPARE • SUCCEED

Skip in 10

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers