1. Boiling- Water can be boiled over a campfire. Bacteria is killed by high boiling temperature but boiling on its own may not get rid of harmful chemicals present in the water. If water is boiled over a campfire, little cost is needed but hikers have to know how to start a fire. Purification tablets – Add purification tablets to… Read more →
Month: February 2017
Application Exercise 15/02/17
The Earth is not cooling rapidly because of the presence of greenhouse gases such as CH4, H2O, CO2, nitrous oxides. These greenhouse gases absorb infrared radiation, which warms the Earth, increasing the Earth’s average temperature. The statement is incorrect. From the photo, it seems that there is more snow cover during this winter, which indicates that the climate conditions has… Read more →
Application Exercise 08/02/17
1a) It is an exothermic process. This is because heating energy is released during the process. b) It is an endothermic process. This is because heat energy is absorbed during the process. c) It is an endothermic process. This is because heat energy is absorbed to melt ice to water. 2. In order to make a good explosion, large… Read more →