Choosing fuels

Question 1

Explain what a hydrogen fuel cell does

Answer 1

combines h & o to form water without burning

reaction releases energy in form of electricity

Question 2

State 4 things a good fuel contains

Answer 2

shud … shudnt
produce ash or smoke
burn easily
easy to store and transport
release a lot of heat energy

Question 3

Hydrogen vs petrol

Answer 3

both burn easily
dont produce ash or smoke
release more energy per kg when it burns than fuels coal,oil or wood -petrol
release nearly 3 times as much energy per kg as petrol
petrol-is liquid easy to store and transport
Hydrogen -gas so it has to be stored at high pressure
filling stations would need to adapt for h to be used cars

Question 4

Investigating fuels

Answer 4

test for which one gives off most heat -measuring time taken for each fuel to raise temp of same volume water by 50 c
measure mass of water before and after to see how much u used
variable control water