Fuels
What is a Hydro-Carbon?
Fuel consisting of hydrogen and carbon
H2CO3 → CO2+H2O
Decomposition
_K+_Br2 → _KBr
2,1,2
Define bond energy
The amount of energy required to break a bond.
What are the numbers in front of H2 and H2O called?
2H2+O2 → 2H2O
Coefficients
What are the common products of combustion reactions?
CO2 and H2O
3H2+N2 → 2NH3
Combination
_CH4+_O2 → _CO2+_H2O
1,2,1,2
What is an endothermic reaction?
A reaction requiring the absorption of heat from its surroundings
Name one industry or process that releases carbon dioxide into the air.
Factories, power plants, cars and trucks, etc.
What things are released through the combustion of hydrogen?
water
CH4 + 2O2 → CO2 + 2H2O
Combustion
_Al+_O2 → _Al2O3
4,3,2
What is an exothermic reaction?
A reaction that gives off heat to its surroundings
The law of Conservation of Mass states...
In a chemical reaction mass is neither created nor destroyed.
What three things are needed for fire or explosions?
Oxygen, heat, fuel
2HCl+Zn → H2+ZnCl2
Single Replacement
_Au2S3+_H2 → _Au+_H2S
1,3,2,3
Type of reaction:
H-H + Cl-Cl → H-Cl + H-Cl
Endothermic
What effect does CO2 have on our planet?
Traps heat in our atmosphere. Global climate change.
How does the combustion of fuel in an engine convert to kinetic/mechanical energy?
Combustion releases heat which increases the temperature in a piston causing it to move and turn the wheels
AgNO3+NaCl → AgCl+NaNO3
Double replacement
_C2H6+_O2 → _CO2+_H2O
2,7,4,6
Type of reaction:
H-H + H-H + O=O → H-O-H + H-O-H
Exothermic
Where is energy stored in molecules?
Bonds