Hess's Law Flashcards
1
Q
What is Hess’s law?
A
Hess’s law states that the enthalpy change for a chemical reaction is the same, whatever route is taken from reactants to products
2
Q
Why do chemists use Hess’s law?
A
Chemists use Hess’s law to work out unknown enthalpy changes by using enthalpy changes that they can measure
3
Q
How can Hess’s law be shown at times?
A
Hess’s law can be shown through thermochemical cycles
4
Q
What is the equation for calculating Hess’s law?
A
△H = [sum of△fH products] - [sum of△fH reactants]
5
Q
What is the equation for calculating combustion
A
△H = [sum of △cH reactants] - [sum of△cH products]
6
Q
Do the practice questions on the sheets and then exam questions
A
DO PRACTICE QUESTIONS ON THE SHEETS AND THEN EXAM QUESTIONS
