When sodium carbonate reacts with ethanoic acid, the process which takes place is known as effervescence.
The following reaction occurs:
2 CH3COOH + NA2CO3 = 2CH3COONa + H2O + CO2
Hope uh understand it.

**Brisk Effervescence**

Effervescence refers to the rapid escape of gas bubbles from a liquid. It is commonly observed when a carbonated beverage is opened or when an antacid tablet is dropped into water. Brisk effervescence refers to a particularly vigorous or lively effervescence, characterized by a rapid and energetic release of gas bubbles. Let's delve into the details of what this term entails.

**The Nature of Effervescence**
Effervescence occurs due to the release of a gas, generally carbon dioxide (CO2), from a liquid. This gas is dissolved in the liquid under high pressure, and when the pressure is reduced, such as when the container is opened or when a reaction occurs, the gas bubbles escape. This process is driven by the tendency of the gas to reach equilibrium with the surrounding atmosphere.

**Factors Influencing Brisk Effervescence**

Several factors can contribute to the briskness of effervescence:

1. **Temperature**: Higher temperatures generally enhance the rate of gas escape, leading to a more brisk effervescence. This is because the solubility of gases decreases with increasing temperature, allowing the gas to escape more readily.

2. **Concentration of Gas**: A higher concentration of gas in the liquid will result in a more vigorous effervescence. Carbonated beverages, for example, contain a high concentration of dissolved CO2, leading to a brisk effervescence when opened.

3. **Surface Area**: The availability of a larger surface area for gas bubble formation can increase the briskness of effervescence. This can be observed when pouring a carbonated beverage into a glass, as the liquid splashes and increases the surface area, resulting in a more energetic effervescence.

4. **Presence of Nucleation Sites**: Nucleation sites are tiny imperfections or irregularities in a container that promote the formation of gas bubbles. The presence of these sites can accelerate effervescence, leading to a brisk release of gas bubbles.

**Applications of Brisk Effervescence**
Brisk effervescence is not only a fascinating phenomenon but also finds practical applications in various areas:

1. **Food and Beverage Industry**: The carbonation process in the production of carbonated beverages relies on brisk effervescence to dissolve and release CO2, creating the characteristic fizz.

2. **Pharmaceutical Industry**: Effervescent tablets, which rapidly dissolve in water, utilize brisk effervescence to enhance drug delivery and improve patient compliance.

3. **Chemical Reactions**: Certain chemical reactions, such as the reaction between an acid and a base, can exhibit brisk effervescence. This is commonly observed when an antacid tablet is dropped into water, producing a rapid release of gas bubbles.

In conclusion, brisk effervescence refers to a rapid and energetic escape of gas bubbles from a liquid. Various factors, including temperature, gas concentration, surface area, and nucleation sites, influence the briskness of effervescence. This phenomenon has practical applications in industries such as food and beverages, pharmaceuticals, and chemical reactions.