Chemistry
Question 1
The normal internal body temperature is 37.0 °C (98.6 °F). It changes depending on the time of the day and the level of body metabolic activities (Kelly, G., 2006). However, this does not mean that it is not normal. It has to vary so as to cope up with the internal and external conditions to which it is exposed. Although slight changes in the body temperature may not affect its health, exposure to hot or cold environments can shift the temperature to the extremes.
In this case, the normal body functioning may be affected in different ways. First, when it reaches 44°C (111.2°F), a person dies. This also happens at lower temperatures going below 26°C (78.8°F). However, in such situations, the body can return to normalcy through vasodilatation or vasoconstriction (Kelly, G., 2006).
Question 2
The process occurring in Mount Everest is called sublimation. It involves a direct change of solid to the gaseous status. The snow at the peek of the mountain has to undergo sublimation because of the conducive environmental conditions. The mountain is surrounded by dry winds, higher altitudes and low Relative Humidity. During this process, energy is consumed at different amounts (Ramsey, J., 2005). There is a requirement for kinetic and potential energy.
Since it is a natural occurrence, the energy is provided by the sun. Meanwhile, water also provides the energy called heat of vaporization which aids in its vaporization. It is scientifically quantified to 2,260 kilojoules/kilogram. Meaning, the weather conditions around Mount Everest make it conducive for the process of sublimation to occur. Ice is like a Carbon dioxide which also has an ability to directly change from solid to gas.
References
Kelly, G. (2006). "Body temperature variability (Part 1): a review of the history of body
temperature and its variability due to site selection, biological rhythms, fitness, and
aging". Altern Med Rev 11 (4): 278–93.
Ramsey, J. (2005). Tiger of the Snows. New York: Putnam.
