Rick's Science Quiz True/False
The total amount of energy needed to break bonds or the total amount released as excess energy when bonds are formed, determines if it is endothermic or exothermic.
True
An endothermic reaction releases energy
False
An exothermic reaction absorbs energy
False
An exothermic reaction gets colder
False
Both bond breaking and bond forming are taking place in a physical change.
False
Electrons are positive
False
In a chemical reaction, the bonds between the molecules/atoms of the reactants are broken apart. When the molecules/atoms form new bonds, nothing happens.
False
Neutrons determine the net charge
False
A larger amount of energy absorbed from the surroundings is needed to break bonds of reactants in an endothermic reaction.
True
An endothermic reaction absorbs energy
True
An endothermic reaction gets colder
True
An exothermic reaction releases energy
True
Both bond breaking and bond forming are taking place in a chemical reaction.
True
In a chemical reaction, the bonds between the molecules/atoms of the reactants are broken apart. When the molecules/atoms form new bonds, a product is created.
True
It takes energy (usually thermal energy) to form or break bonds.
True
Protons determine the element
True
Some thermal energy absorbed from the surroundings is needed to start the reaction. This is called activation energy.
True