Fuels 2 Flashcards
Name 3 fossil fuels
Coal
Crude oil
Natural Gas
What is a fuel
A fuel is a chemical that burns to produce energy
What is combustion
The name given to the reaction when fuels burn in oxygen
What does exothermic mean
A reaction that releases/ gives out heat energy
What does endothermic mean
A reaction that takes in heat energy
What is the process used to separate crude oil
Fractional distillation
What property of the compounds in crude oil allow them to be separated by fractional distillation
The compounds have different boiling points
What is a hydrocarbon
A compound made up of only hydrogen and carbon
What are the products of combustion when a hydrocarbon burns completely in oxygen
Carbon dioxide and water
What are the products of incomplete combustion
Carbon monoxide and soot
What is the test for carbon dioxide
Carbon dioxide turns lime water cloudy
What is the test for water?
Water turns cobalt chloride paper from blue to pink
What is the equation for calculating the energy released when fuels burn
Eh = cm🔺T
Name the process where plants use up carbon dioxide
Photosynthesis
Name the three processes which release carbon dioxide into the atmosphere
Combustion
Deforestation
Respiration
Write a word equation for the combustion of a hydrocarbon
Hydrocarbon + oxygen —> carbon dioxide and water
How does flammability change as boiling point increases
As boiling point increases the flammability decreases
How does viscosity change as the size of a molecule increases
As the size of the molecule increases, the viscosity increases
Fossil fuels are a finite resource true or false
True
