Reactivity 1.3 Flashcards
What’s the ultimate source of energy on the planet?
The sun
Fuel
Source of chemical energy, any compound releasing energy when oxidized.
What type of fuels are renewable and non-renewable?
Biofuels = renewable, Fossil fuels = finite
In complete combustion reactions how does oxegyn act?
It acts as the oxidizing agent as it is being reduced.
How do you find specific energy?
Energy released from the fuel divided by the mass of the fuel consumed.
Why does gasoline produces about 1.6 times as much energy and 1.4 times as much energy as ethanol?
It has a greater energy density.
Why is ethanol more environmentally friendly than gasoline?
Ethanol is from grown crops so it doesn’t alter the amount of CO2, where as gasoline does bc it’s a fossil fuel.
What’s a disadvantage of ethanol?
It uses up land that could be used to grow crops.
When incomplete combustion occurs…
Less heat energy is evolved
The more the carbon atoms are in a compound…
The more likely it is that incomplete combustion will occur
Why is CO so dangerous?
It has a high affinity for haemolglobin, so it can irreversibly bind to it and prevent oxygen from being transported in blood.
Alkanes react with oxygen in combustion reactions to produce…
Carbon dioxide and water.
Why do alkanes make good fuels?
They release large amounts of heat in exothermic reactions.
As the number of carbon atoms increases…
The enthalpy change also increases
Fossil fuels
Coal, Oil, and natural gas
