Question

You are in a closed crowded room with a lot of other people. In all likelihood you will start getting very hot and actually begin sweating. Describe what is happening thermodynamically to you and to the room. Make sure you describe your control boundary or control volume. List all assumptions including initial temperatures, pressures, etc. You need to discuss what is happening thermodynamically by referencing the 1st and 2nd Laws of Thermodynamics. Pv and Ts diagrams may be helpful in describing what is occurring.

Answer 1

The law of thermodynamics is applying when we are considering human body. When the experience of being in a small crowded room with lost of other people, you will start feeling very warm and then later will start sweating.

This is the process where your body start using to cool itself off. Heat from the body is transferred in the form of sweat. Why in the form of sweat? As the sweat absorbs more and more heat, it starts evaporating your body, become more disordered and transfer the hear to the surrounding air, due to which there is increases in the air temperature of the room. Many people sweating at the same time in the crowded room, which make it as a “Closed system”, will quickly heat things up. Here both first and second laws of thermodynamics are in actions as there is no heat loss outside the room, it is merely transferred and approaches equilibrium with maximum entropy.