C3 - Energy Flashcards
1
Q
What are exothermic reactions?
A
Exothermic reactions are reactions that give energy out to the surroundings.
2
Q
What are endothermic reactions?
A
Endothermic reactions take in energy from the surroundings.
3
Q
Is bond making exothermic or endothermic?
A
Bond making is an exothermic process.
4
Q
Is bond breaking an exothermic or endothermic process?
A
Bond breaking is endothermic.
5
Q
What is activation energy/?
A
the minimum quantity of energy which the reactants must possess in order to undergo a specified reaction.
6
Q
What is the word equation for the burning of ethanol?
A
ethanol + oxygen = carbon dioxide + water
7
Q
How is fuel comparing tested fairly?
A
- use the same size and type of calorimeter
- measure out the same volume of water
- use water that had the same starting temperature
- burn fuels for the same amount of time
