Chemical reactions Flashcards
When methane burns in oxygen, carbon dioxide and water are made. Which is a reactant?
oxygen is the reactant while the carbon dioxide is the product
Copper oxide and carbon dioxide are made when copper carbonate is heated strongly. Which is a product
copper oxide is the product and copper carbonate is the reactant
What is another name for combustion?
Burning is also another way to describe
What name is given to the force that holds atoms together in a compound?
Chemical bonds hold atoms together in a compound. Electrostatic attractions pull together particles with opposite electrical charges.
Combustion reactions always release energy. What word can be used to describe them?
Exothermic reactions always release energy.
Which of these is found in the fire triangle and is therefore essential for combustion? oxygen carbon dioxide and water
Oxygen is essential for combustion.
What is a hydrocarbon?
A compound made from carbon and hydrogen only
What is produced when a hydrocarbon fuel burns in a very good supply of oxygen?
Carbon dioxide and water are produced. Carbon monoxide is produced when there is not enough oxygen
Which type of combustion releases the most energy?
Complete combustion
What name is given to a substance that speeds up a reaction without being used up or chemically changed
A catalyst speeds up a reaction.
The substances that react together are called the
Reactants
The substances that are formed in the reaction are called the
products
are atoms created or destroyed in a chemical reaction
no
because no atoms are being created or destroyed in a chemical reaction does that mean the mass of the reactant and the mass of the products the same?
yes they are the same and for this we would say mass is conserved in a chemical reaction
are physical changes reversible
yes physical changes are reversible because the products can change back into the original reactant
