BRAINCAKEHess's Law Example 8
Worked example: combining equations
Sometimes you are given whole equations with their enthalpy changes instead of a table of data. Hess's law means you can add and subtract equations like algebra, as long as you do the same to their ΔH values.
Find ΔfHθ of carbon monoxide:
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Key terms in this lesson
- hess's law
- The principle that the total enthalpy change for a reaction is the same regardless of the route taken, provided the starting and finishing conditions are the same.
More in Enthalpy
- Hess's Law Example 2
- Hess's Law Example 3
- Hess's Law Example 4
- Hess's Law Example 5
- Hess's Law Example 6
- Hess's Law Example 7
- Hess's Law Example 9
- Hess's Law Example 10
All 21 lessons in Enthalpy · All Edexcel AS-level Chemistry topics