BIOL 1201 Chapter : Chapter 3
Document Summary
Heat is the total kinetic energy due to the motion of molecules within matter. Kinetic energy is the energy of motion. Temperature is the measure of heat of matter. It represents the average kinetic energy, regardless of volume: a pot of coffee will have a much higher temperature than a swimming pool. But the pool contains more heat due to a larger volume: water has a high heat of vaporization and cools surfaces as it evaporates. So what is left is, on average, cooler: evaporation of sweat dissipates your body heat, high humidity prevents this because of the high amount of water vapor in the air. Nonpolar substances are hydrophobic: hydrophilic substances have an affinity for water while hydrophobic substances do not. It is always associated with another water molecule in the form of an hydronium ion: acid is a substance which increases the concentration of. H+ in a solution: base is a substance which reduces the concentration of.
