Unit 5- Energy Changes Flashcards
Exothermic reactions transfer heat ?
Into the surroundings
Exothermic reactions are accompanied by a temperature ?
Rise🔥
A hand warmer is an example of a ?
Exothermic reaction
Endothermic reactions transfer heat energy from ?
The surroundings to the chemicals
Endothermic reactions are accompanied by a ? In temperature
Fall❄️
Example of an endothermic reaction
Heat sports pack
What is a reversible reactions
If the reaction is exothermic in one direction, then it it endothermic in the opposite direction
See required practical investigating what
The variables that affect temperature changes in reacting solutions
Which reaction needs energy from the surroundings to break bonds and then less energy is released when formed (think of the magnets)
Endothermic
Energy released when new bonds formed is GREATER than energy needed to break.
Which reaction is this
Exothermic
In an exothermic reaction diagram, the reactants are ? Than the products
Higher because they have more energy
In an endothermic reaction, the reactants are ? than the products
Lower
What is activation energy
The minimum amount of energy needed for bonds in reactions to start reacting
How can a catalyst effect rate of the reaction
A catalyst reduces the activation energy needed for a reaction, making it speed up
