✔ 最佳答案
Non reversible reactions that go to completion are the norm in inorganic chemistry:
Typically:
NaOH + HCl → NaCl + H2O
At the end of this reaction, if the two reactants are used in 1:1 molar quantities, there will be no HCl or NaOH remaining, but there will be a solution of NaCl You will have an impossible task to adjust conditions such as temperature, pressure etc in order to make the solution of salt in water re- produce HCl and NaOH. This is only possible by complicated electrolysis methods, etc. which hardly make the reaction chemically reversible. This can truly be classified as a nonreversible chemical reaction that goes to completion.
The list of nonreversible inorganic reactions is endless.
But there are some which are reversible, such as the thermal decomposition of CaCO3
CaCO3 +heat → CaO + CO2
The CaO will react with water to form the hydroxide
CaO + H2O → Ca(OH)2 + heat
This in turn will react with CO2 to form the carbonate
Ca(OH)2 + CO2 → CaCO3 + H2O You have reversed the reaction to again form the CaCO3 you started with, and recovered the H2O that was used as an intermediate in the process.
But take note that in each of the three steps shown above, the reactions go to completion, given the correct quantity of reactants