Which of the following items represents a chemical change? burning melting evaporation freezing

the physical properties of a compound are similar to those of its elements.
a. true
b. false

1. Which of the following items represents a chemical change? burning melting evaporation freezing

Explanation:

Chemical properties depend on composition while physical properties do not depend on composition. As in case of burning, composition changes due to this , this is chemical properties while freezing, melting and evaporating process, composition remain same, so these have physical properties, like water in liquid, ice and vapor state have same composition.

2. The physical properties of a compound are similar to those of its elements.  

Explanation:

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.