Which of the following is exothermic?
A.boiling of water
B.person growing
C.choppening of tree
D.freezing of water
Exothermic means you release energy.
D, freezing water, means the water releases heat in order to freeze. This release of heat, aka energy, makes it exothermic.
The other answer choices require energy, making them endothermic.
To determine which of the given options is exothermic, we need to understand what exothermic means. Exothermic refers to a process or reaction that releases energy in the form of heat or light.
Now let's analyze each option to find the exothermic process:
A. Boiling of water: Boiling is the process of converting liquid water into water vapor due to the absorption of heat energy. This is an endothermic process because it requires an input of energy to convert water into steam. Therefore, boiling of water is not exothermic.
B. Person growing: The process of a person growing involves various physiological changes such as bone development, muscle growth, and cell division. While it does require metabolic reactions and energy consumption, it does not involve the release of energy in the form of heat or light. Therefore, a person growing is not exothermic.
C. Chopping of tree: Chopping a tree involves physical work and mechanical energy to break down the tree into smaller pieces. It does not involve any chemical reactions that release energy in the form of heat or light. Therefore, chopping a tree is not exothermic.
D. Freezing of water: Freezing is the process of converting liquid water into ice by removing heat energy. When water freezes, it releases energy in the form of heat. This energy release makes the environment around the water colder. Therefore, freezing of water is an exothermic process.
Answer: The exothermic process among the given options is the freezing of water (Option D).