Introduction to Enthalpy Cycles

Question 1

What is hess’s law?

Answer 1

= if reactions can be carried out by the two different pathways
=total enthalpy for these 2 pathways will be the same
provided that the start and final conditions are the same for both pathways

Question 2

If it is combustion where should the arrows be pointed to?

Answer 2

= from the ceiling to the floor

Question 3

if it is formation where should the arrows be pointed to?

Answer 3

= from the floor to the ceiling

Question 4

What do we write at the bottom of the cycle?

Answer 4

= the elements found in the reactants
= make sure it is balanced