Reactions Flashcards
In a reaction the mass will be conserved, what does this mean?
The total mass of reactants will be equal to the total mass of the products.
Balanced symbol equations show..
The amounts of all of the individual atoms in a reaction.
What is combustion?
The burning of a fuel in oxygen.
A fuel is a substance which….?
stores energy in a chemical store.
3 examples of fuels
petrol, diesel and coal
What is produced when a carbon based fuel undergoes combustion?
Water and carbon dioxide
What is thermal decomposition?
A reaction where the reactions are broken down (decomposition) using heat (thermal decomposition)
True or false… exothermic reactions involve a transfer of energy from the reactants to the surroundings
True !
What happens as energy is transferred to the surroundings?
Increase in temperature
True or false… endothermic reactions involve a transfer of energy from the surroundings to the reactants
True!
What happens as energy is taken into the reactants?
A decrease in temperature will be shown.
