6B Enthalpy level diagrams

Question 1

energy level diagrams for exothermic reactions are always

Answer 1

the final enthalpy of a system is less than the initial enthalpy

Question 2

energy level diagrams for endothermic reactions are always

Answer 2

the final enthalpy is more than the initial enthalpy

Question 3

what is the equation for change in enthalpy

Answer 3

H(products) - H (reactants)

Question 4

what are 4 things to remember while constructing an enthalpy level diagram

Answer 4

1. always label the y axis but you don’t have to label the x-axis but if you want to label it extent of reaction or progress of reaction
2. you have to write both the product and the reactants with there symbol states
3. you always have to include the enthalpy number change with the correct sign
4. you don’t have to include the activation energy