energy changes (further) Flashcards
1
Q
What is bond breaking known as?
A
endothermic
2
Q
What is bond making known as?
A
exothermic
3
Q
In exothermic reactions, which energy level is higher, reactants or products?
A
products
4
Q
In endothermic reactions, which energy level is higher, reactants or products?
A
reactants
5
Q
How do we find energy in fuels?
A
burning the fuel and heating water
6
Q
What is the equation for finding heat energy?
A
mass water x 4.2 x temp rise
7
Q
How is the energy in fuels compared?
A
looking at the energy per g
8
Q
What are the advantages of using hydrogen fuel cells? (2)
A
don’t produce CO2, don’t produce acid rain
9
Q
What are the disadvantages of using hydrogen fuel cells? (2)
A
it is flammable, takes up a large volume
