# How do I know which atoms react during hydrolysis?

In the hydrolysis of propanamide ($\ce{CH3CH2CONH2}$) how do I know which molecules react with the water?

$$\ce{CH3CH2CONH2 + H2O -> ?}$$

I don't know how to split the molecule. In the videos I've watched (example) it seems as they just assume you know this.

$$\ce{CH3CH2CONH2 + H2O -> CH3CH2COOH + NH3}$$