Question

When heated a solution of carbonic acid yields carbon dioxide gas and water vapor. Classify this reaction.

H2CO3(aq) → CO2(g) + H2O(g)
A) Synthesis
B) Decomposition
C) Double Replacement
D) Single Replacement

Answer 1

We are given the chemical reaction
H2CO3(aq) → CO2(g) + H2O(g)
This type of reaction is a 
B) Decomposition 
reaction

A single chemical compound produces more than 1 compound in the reaction which is the definition of a decomposition reaction.

Answer 2

Answer: Decomposition

Explanation:

Decomposition reaction has to do with the breakdown of compounds into its constituent element under the application of temperature and pressure. H2CO3 here was broken down into CO2 and H2O gas.