Essay on The Thermal Energy Of Tea
Tea is the most widely consumed drink (other than water) on a global scale (Jacobs, 2014). Generally served just below 100 degrees Celsius, issues such as heat transfer limit the appreciation of the beverage.
The thermal energy in tea is defined by the movement or kinetic energy of the particles within the tea, hence, a decrease in the movement of the particles reduces the temperature. The thermal energy in the tea is lowered via means of energy transfer through convection, conduction, radiation and evaporation.
Convection is a result of convection currents which carry the dense tea down, pushing the less dense tea to the surface, where the hot substance transfers energy to the cooler air, before falling as its density is increased. This process occurs within a circular motion in both the tea and the surrounding gases, increasing the effects of conduction. Conduction is a result of contact between particles, explained with reference to the game of pool; when one ball collides with another, the energy driving it forward is reduced, while the previously stationary ball gains motion, therefore energy. Via means of conduction, energy is transferred from tea to all surrounds (i.e. the cup, the air, etc.) until an equilibrium is reached.
Radiation is the transfer of energy due to the emission of electromagnetic waves, the quantity of which is determined by the temperature of the tea and its surroundings. The effects are reduced through the use of…