Energy Changes Flashcards
1
Q
What are the Advantages of hydrogen fuel cells?
A
Doesn’t need to be electrically recharged, No pollutants are produced, Can be a range of sizes for different uses
2
Q
What are the Disadvantages of hydrogen fuel cells?
A
Hydrogen is difficult to store, highly flammable and is sometimes produced for the cell by non-renewable resources
3
Q
How do you calculate the enthalpy change?
A
Bonds broken - bonds made
4
Q
State 4 types of exothermic reactions?
A
Combustion,Neutralisation, Oxidation-Reduction, Respiration, Displacement
5
Q
State 4 types of endothermic reactions?
A
Dissolution, Electrolysis, Photosynthesis, Thermal decomposition
