Hess's Law

Question 1

Hess’s Law of Constant Heat Summation states…

Answer 1

• Regardless of the multiple steps in a reaction, the total enthalpy change is the sum of all changes
• Because enthalpy is a state function

Question 2

Path Function

Answer 2

Steps taken matter to reach a specific value

Question 3

ΔH° represents

Answer 3

• ΔH nought
• The standard enthalpy at 25℃ and 100kPa

Question 4

Final considerations of Hess’s Law

Answer 4

The state of the reactants and products is important because it affects enthalpy