Imagine that a hypothetical life form is discovered on our moon and transported
ID: 485485 • Letter: I
Question
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 195 cat/g. The scientist observing the extraterrestrial life form also begins to sweat. The heat of vaporization of the scientist's sweat is 580 cal/g at the skin's surface. If both the extraterrestrial life form and the scientist lose 261 g of sweat over the course of one hour, calculate the heat lost by each body from the vaporization of sweat.Explanation / Answer
Ans. #1. Extraterrestrial life form:
Given,
Heat of vaporization = 195 cal/ g
That is 195.0 cal energy is required to vaporize 1.0 gram body fluid from skin to the atmosphere. So, it also means that 195.0 cal energy is lost while sweat formation (vaporization) of 1.0 g fluid.
So,
Heat lost = heat of vaporization x total mass of sweat formed
= (195 cal/ g) x 261 g
= 50895 cal
#2. Scientist:
Heat lost = heat of vaporization x total mass of sweat formed
= (580 cal/ g) x 261 g
= 151380 cal