Exothermic and endothermic reactions Flashcards
How do you draw an enthalpy diagram for an exothermic reaction?
With the enthalpy of reactants higher than of the products
What is delta H in an exothermic reaction?
It is negative
Why are exothermic reactions negative?
Heat energy is released to surroundings
How do you draw an enthalpy diagram of an endothermic reaction?
The enthalpy of reactants is lower than that of products
What is the delta H of endothermic reactions?
It is positive
Why are endothermic reactions positive?
Heat energy is absorbed from the surroundings
What is delta H?
Enthalpy change
Why does temperature increase of a solution when energy is lost?
Energy is given to the surroundings and the thermometer is the surroundings
What happens if you measure the temperature of an exothermic reaction mixture?
It will increase
What happens if you measure the temperature of an endothermic reaction mixture?
It will decrease
How is activation energy drawn on an enthalpy profile?
It is the space from the base of the reactants to the peak of the curve
How do you calculate the reverse activation energy?
Original activation energy + delta H
