The process of conversion of inorganic substance into organic substance in presence of light by autotrophs is known as photosynthesis
Autotrophs : the organism which can synthesize their own food
The inorganic substanc used by autotrophs is CO2 and water
This CO2 and water is converted to glucose in presence of light or chemical energy.
The reaction is
6CO2 + 6H2O ---> C6H12O6 + 6O2
Thus in the process O2 is released as by product
Answer:
Exothermic reaction
Explanation:
The freezing of n-octane is an exothermic reaction.
An exothermic reaction is a type of reaction in which energy usually in the form of heat is released to the environment. In an exothermic reaction, the reactants are at a higher energy level compared to the product. Hence heat energy is usually released.
Now, freezing is a change in state from the liquid state to the solid state , for example, the turning of water to ice block.
In freezing, energy is released and hence, thus it is an exothermic reaction
Releases heat
(Exothermic)