Qn 1: (a) Exothermic process. The heat that is released by the briquette can be felt in the surrounding. (b) Endothermic process. The water molecules must take in heat energy (increase in kinetic energy) in order to evaporate. (The skin gets cooled as water evaporates). (c) Endothermic process. The ice will take in heat energy from the warmer surrounding, causing… Read more →
Author: Brandon Huang
Ozone depletion: an ongoing and persistent issue
The ozone layer resides in the stratosphere of the Earth’s atmosphere, and is a protective layer that aids in the absorption of UV radiations emitted by the Sun. After the introduction and use of CFCs related products such as aerosol sprays, the depletion of the ozone layer has started to become a constant topic of discussion. The ozone depletion is… Read more →