Uploaded April 2026 | Updated September 2026, 3 weeks ago
What is Hess Law of Constant Heat Summation | Thermochemistry | Chemistry Class 11 | Enthalpy Calculations
This video explains Hess Law of Constant Heat Summation, which states that the total enthalpy change of a reaction remains the same whether the reaction occurs in one step or multiple steps. We derive the relation ΔrH = ΔrH₁ + ΔrH₂ + ΔrH₃ and apply it to real chemical reactions.
Using examples like the formation of carbon monoxide and carbon dioxide, we demonstrate how to calculate enthalpy changes indirectly when direct measurement is not feasible. The video also covers standard enthalpy values and stepwise reactions to determine ΔrHθ accurately.
This explanation is ideal for understanding enthalpy calculations, reaction pathways, and the core principles of thermochemistry for Class 11 students.
#chemistry #thermochemistry #hesslaw #class11 #science #enthalpy #neet #jee
What is Hess Law of Constant Heat Summation | Thermochemistry | Chemistry Class 11 | Enthalpy Calculations
This video explains Hess Law of Constant Heat Summation, which states that the total enthalpy change of a reaction remains the same whether the reaction occurs in one step or multiple steps. We derive the relation ΔrH = ΔrH₁ + ΔrH₂ + ΔrH₃ and apply it to real chemical reactions.
Using examples like the formation of carbon monoxide and carbon dioxide, we demonstrate how to calculate enthalpy changes indirectly when direct measurement is not feasible. The video also covers standard enthalpy values and stepwise reactions to determine ΔrHθ accurately.
This explanation is ideal for understanding enthalpy calculations, reaction pathways, and the core principles of thermochemistry for Class 11 students.
#chemistry #thermochemistry #hesslaw #class11 #science #enthalpy #neet #jee
