Spontaneous and Non-Spontaneous Process: Spontaneous Process: A process which takes place on its own under the given set of conditions is called a spontaneous or natural process. They are also called feasible processes. Thus, the tendency of a process to occur naturally is called the spontaneity. The spontaneous processes occur with or without the initiation. Spontaneous processes need not to be instantaneous. Spontaneous processes include both physical and chemical reactions. Some examples of spontaneous process are: Formation of clouds in the sky. Flow of water from river towards the sea. Flow of heat from a hot body to a colder … Continue reading Spontaneous and Non-Spontaneous Process