Answer:
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Explanation:
Answer:
The color red is physical
Answer:
Both solids and liquids have a definite volume
Explanation:
There are three states of matter which are; solids, liquids and gases.
All three states of matter have unique peculiarities. The solids have a definite shape and volume because of very strong intermoleclar forces in operation in the system.
Liquids also have a definite volume, but do not have a definite shape. They take the container's shape. However, there are less intermolecular interaction in the liquid states.
It is common to assume that gas particles do not interact. A gas does not have definite shape and volume and the weakest magnitude of intermolecuar interference.
A chemical reaction absorbs energy which means it is endothermic reaction.
The reaction is endothermic if the energy of products is more than the energy of reactants.
The energy of products is more means that the bond energy of products is more than the bond energy of reactants.
so breaking of bond needs energy which is greater than the energy released in making of new bonds.
Enthalpy of reaction = Bond energy of reactants - Bond energy of products.