Chapter 8 Flashcards
What are chemical reactions
When reactants combine to form products
What are exothermic reactions
Reactions that release energy from chemicals to surroundings, increasing room temperature
What is fuel? What does it have to start an exothermic reaction?
Substances that react with oxygen. Needs to have stored chemical energy.
What is combustion/ burning
Chemical reaction where a substance reacts with oxygen
What 3 things are needed for combustion to begin
Heat, fuel and oxygen
Write a word equation for:
1. Carbon
2. Magnesium
- Carbon+ oxygen==> carbon dioxide
- Magnesium+ oxygen==> magnesium oxide
Another word for spread
Dissipate
What is the word equation for burning hydrogen and what is it used for
Hydrogen+ oxygen==> water
~ used for fuel in model rockets
What is chemical energy transferred to when fuel burns
Thermal, sound, light
What sound does hydrogen make when it’s produced
Pop sound
What sound does carbon dioxide make when it’s produced
A fizzing sound
What’s an example of an exothermic reaction (water)
Patssium + water==> potassium hydroxide+ hydrogen
What’s an exothermic reaction example (acid)
Magnesium + hydrochloric acid==> magnesium chloride + hydrogen
