Thermodynamics and Thermochemistry · Thermodynamics

Hess's Law and Bond Enthalpies

Using the principle of conservation of energy to calculate enthalpy changes indirectly.

Key Questions

  1. 1Why is enthalpy change independent of the pathway taken by a reaction?
  2. 2How can bond enthalpy data be used to predict the overall energy change of a reaction?
  3. 3What is the relationship between bond strength and reaction spontaneity?

NCCA Curriculum Specifications

NCCA: Senior Cycle - Energy and Rates of Reaction
Class/Year: 6th Year
Subject: Advanced Chemical Principles and Molecular Dynamics
Unit: Thermodynamics and Thermochemistry
Period: Thermodynamics

Suggested Methodologies

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