why are decompositin reaction is called opposite of combination reaction 

Asked by JassimbinFasim | 16th Feb, 2019, 10:29: PM

Expert Answer:

In decomposition reactions a single substance decomposes to form two or more substances.
 
begin mathsize 12px style C a C O subscript 3 space rightwards arrow with H e a t space on top space C a O space plus space C O subscript 2 end style
In combination reaction in two or more reactants combine to form a single product.
 
CaO + CO2 → CaCO3 + Energy
 
From above examples, it is clear that the two reactions are exactly opposite to each other because of that, decomposition reactions are called opposite of combination reactions

Answered by Science Mate | 17th Feb, 2019, 01:10: AM