Energy Changes In Reactions (exo, Endo) Flashcards
Define an exothermic reaction
A reaction that releases energy to surroundings, heating them up.
Examples of exothermic reactions
Combustion, corrosion, respiration and neutralisation
Define an endothermic reaction
A reaction that absorbs energy from the environment
Examples of endothermic reaction
Photosynthesis, melting and sherbet
Energy change in a reaction equation
Bonds broken - bonds made = energy change (J)
If the energy needed for a reaction is negative, what sort of reaction is it?
Exothermic (energy released)
What’s the x and y axis of a reaction profile?
Y = energy (|)
X = progress of reaction (—)
In an exothermic reaction are the products above or below reactants?
Below. Starts high goes low.
If the 🔺H positive what sort of reaction is it?
Endothermic as diagram goes up
Where is the Ea on a reaction profile?
From reactants line to top of curve
Where is the 🔺H on a reaction profile?
From reactants to products
