Actually Module 2 Flashcards
How can chemical reactions be identified?
Chemical reactions can be identified by energy changes
What are exothermic reactions?
Exothermic reactions release energy to the surroundings so the products have less chemical energy than the reactants
What are endothermic reactions?
Endothermic reactions release energy to the surroundings so the products have MORE chemical energy than the reactants
What is a fuel?
A fuel is a substance which is burned to release energy
What is combustion
Combustion is another word for burning
What happens when a substance burns?
It reacts with oxygen
What is the test for oxygen
The test for oxygen is that it lights a glowing splint
How is carbon dioxide produced
Carbon reacts with oxygen to produce carbon dioxide
What is the test for carbon dioxide
The test for carbon dioxide is that it turns lime water cloudy
How is carbon monoxide produced?
Carbon monoxide can be produced when carbon burns in an insufficient supply of oxygen
Is carbon monoxide safe?
No it is a toxic gas
How is water produced?
Hydrogen reacts with oxygen to produce water
What is the test for hydrogen
The test for hydrogen is that it burns with a squeaky pop
What is hydrogen being hailed as?
Hydrogen is being hailed as a fuel of the future
Name three fossil files
Coal,oil and gas are fossil fuels
