Study MaterialsNCERT SolutionsNCERT Solutions for Class 11 ChemistryNCERT Solutions for class 11 Chemistry chapter 6 thermodynamics function 6.4 enthalpy change, ∆rh of a reaction – reaction enthalpy

NCERT Solutions for class 11 Chemistry chapter 6 thermodynamics function 6.4 enthalpy change, ∆rh of a reaction – reaction enthalpy

NCERT Solutions for Class 11 Chemistry Chapter 6 Topic- Enthalpy Change, ∆rH of a Reaction – Reaction Enthalpy

NCERT Solutions for Class 11 Chemistry Chapter 6 Topic- Enthalpy Change, ∆rH of a Reaction – Reaction Enthalpy, and all chapter Topics produced by qualified teachers according to NCERT (CBSE) book rules are available as a free PDF download. Class 11 Chemistry Chapter 6 Topic- Enthalpy Change, ∆rH of a Reaction – Reaction Enthalpy Questions with Solutions to assist you in revising the entire syllabus and achieving higher grades. Register to receive all exercise solutions through email.


Overview of topic

The standard enthalpy of formation, which has been found for a wide range of chemicals, is enthalpy change. The reactants undergo chemical changes and combine to form products in any general chemical reaction. The following equation can be used to represent it:

Enthalpy Change: Standard Enthalpy of Reaction

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    The change in enthalpy for each such reaction is expressed as rH and is referred to as the reaction enthalpy. Subtracting the sum of the enthalpies of all the reactants from the enthalpies of the products yields the reaction enthalpy.


    tH equals the sum of the product’s enthalpies minus the sum of the reactants’ enthalpies.

    Enthalpy Change: Standard Enthalpy of Reaction

    When all of the components involved in the reaction, such as the reactants and products, are in their standard form, the standard enthalpy of the reaction may be computed. As a result, when a matter is converted by a chemical reaction under standard circumstances, the standard enthalpy of reaction is the enthalpy change that happens in the system.

    The standard state for any substance at a given temperature is its pure form at 1 bar pressure, according to the convention. For example, liquid ethanol in its pure form is considered to be in its standard condition at 298 K and 1 bar of pressure. It’s worth noting that the data for a substance’s standard state is obtained at 298K. A reaction’s standard enthalpy is written as rHs. The heat of the reaction is exactly equal to the enthalpy change of the reacting system under constant pressure.

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    FAQs (Frequently Asked Questions)

    1. Can I score full marks in Class 11 Chapter 6 Chemistry?

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