why do we sweat ? correlate your answer to thermodyamics?

Answer 1

Water absorbs a lot a energy when it evaporates. This energy, when the water is in the form of sweat on our skin, comes from two sources; the environment, and from our skin. The heat of vaporization of water is 40.65 kJ/mol, or 2.26 kJ/g, or 15.96 kcal/fl.oz. In a hot environment and strenuous work conditions, the typical male sweats 7 oz. every 15 minutes, so, in an hour, his sweat will have cooled him off by absorbing 446 kcal (or 446 food Calories) of energy.

Answer 2

Sweating (also called perspiration or sometimes transpiration) is the loss of a watery fluid, consisting mainly of sodium chloride (commonly known as salt) and urea in solution, that is secreted by the sweat glands in the skin of mammals. Sweat also consists of the chemicals or odorants 2-methylphenol and 4-methylphenol.

In humans, sweating is primarily a means of temperature regulation. Evaporation of sweat from the skin surface has a cooling effect due to the latent heat of evaporation of water. Hence, in hot weather, or when the individual's muscles heat up due to exertion, more sweat is produced. Sweating is increased by nervousness and nausea and decreased by cold. Animals with few sweat glands, such as dogs, accomplish similar temperature regulation results by panting, which evaporates water from the moist lining of the oral cavity and pharynx. Primates and horses have sweat glands in their skin, similar to humans.

Answer 3

To cool our bodies. It is to achieve the equilibrium between the internal and external temperatures and also to keep our bodies at 98.5 degrees F.

Answer 4

it's a cooling mechanism. evaporation is an endothermic process so it steals heat from the body cooling it