C2h4o2 + nahco3 → nac2h302 + h2o + co2
what phase of matter for each of the reactants and products.

The phase of matter for each of the reactants and products are:

C2H4O2 → aqueous

NaHCO3 → aqueous

NaC2H302 → aqueous

H2O → liquid

CO2 → gas

Aqueous can be described as a phase in which a substance is dissolved in a solvent, mostly water. In the following reaction, the reactants C2H4O2 and NaHCO3 are aqueous. The product NaC2H302 is aqueous.

The water produced by this reaction is in liquid form. There might be such reactions where water formed might be in the steam form (gaseous).

As carbon dioxide is a gas, normally in reactions it is dissipated as a gas.