Reactions Flashcards
What is the word equation for complete combustion 🔥 ?
Fuel + oxygen -> carbon dioxide + water 💧
What is the word equation for incomplete combustion 🔥?
Fuel + oxygen -> carbon + carbon monoxide + water 💧
Why does incomplete combustion happen ?
What is created as a result of this?
When a free source of oxygen is not available
Limited supply of oxygen
Soot (carbon) is created
What does thermal decomposition mean?
Breaking down a substance using heat 🔥
Define combustion… 🔥
Combustion is the chemical reaction that takes place when a substance burns and reacts with oxygen to produce heat and light energy 🔥 💡
What can be used to test for carbon dioxide?
Lime water 💧
How do we tell if there is carbon dioxide?
The limewater 💧 goes cloudy ⛅️
What is a chemical reaction?
It is a change in which atoms are rearranged to create new substances
What happens if one of the reactants is a gas?
The mass appears to have increased
What is the law of the conservation of mass? 💪
Mass can’t be created or destroyed, therefore the mass of the reactants must equal the mass of the products.
What happens to the temperature of the surroundings after an endothermic reaction takes place?
There is a temperature drop
Define an exothermic reaction.
A reaction that gives out heat energy, it results in a temperature rise in the surroundings
Is an ice pack an example of an exothermic or endothermic reaction?
Endothermic
Is a candle burning an exothermic or endothermic reaction?
Exothermic
What three energies do bombs 💣 and fireworks 🧨 give off?
Light 💡
Sound
Thermal
