Respuesta :
Explanation:
A reaction which can occur on its own or by providing a little initiation are known as spontaneous reactions.
For example, iron rusts in moist air is a spontaneous reaction as it is occurring on its own.
On the other hand, a reaction which requires more energy or high initiation to occur is known as a non-spontaneous reaction.
For example, water at room temperature cannot be separated into [tex]H_{2}[/tex] and [tex]O_{2}[/tex] gas unless high temperature is provided to water. Hence, it is a non-spontaneous reaction.
Therefore, given reactions are classified as spontaneous and non-spontaneous as follows.
1). Water is separated into [tex]H_{2}[/tex] and [tex]O_{2}[/tex] gas at 25 degree is a non-spontaneous reaction.
2). A cup of hot coffee cools to room temperature is a spontaneous reaction.
3). The extraction of iron metal from iron ore is a non-spontaneous reaction.
4). Perfume molecules spread out to fill the entire room is a spontaneous reaction.
5). Iron rusts in moist air is a spontaneous reaction.
