Energy Changes Flashcards
In an exothermic reaction is heat transferred to or from the surroundings?
To the enviroment.
Name two different types of reaction which are exothermic.
Combustion
Neutralisation reaction
What is an endothermic?
A reaction that takes in energy from the surroundings.
Write down the equation for the thermal decomposition of calcium carbonate.
CaCO3 +(heat) –> CO2 + CaO
What is the purpose of putting the reaction container into a beaker containing cotton wool during an experiment to investigate the temperature change of an exothermic reaction?
Reducing energy lost to the surroundings.
What is the activation energy of a reaction?
Energy need to start the reaction.
In an endothermic reaction, the products of the reaction have more energy than the reactants, true or false?
True.
Bond breaking is an _______ process.
Endothermic.
Bond forming is an _______ process.
Exothermic.
In an ________ reaction, the energy released by forming bonds is greater than the energy used to break them.
Exothermic.
