- Chemical Engineering Basics - Section 1
- Chemical Engineering Basics - Section 2
- Chemical Engineering Basics - Section 3
- Chemical Engineering Basics - Section 4
- Chemical Engineering Basics - Section 5
- Chemical Engineering Basics - Section 6
- Chemical Engineering Basics - Section 7
- Chemical Engineering Basics - Section 8
- Chemical Engineering Basics - Section 9
- Chemical Engineering Basics - Section 10
- Chemical Engineering Basics - Section 11
- Chemical Engineering Basics - Section 12
- Chemical Engineering Basics - Section 13
- Chemical Engineering Basics - Section 14
- Chemical Engineering Basics - Section 15
- Chemical Engineering Basics - Section 16
- Chemical Engineering Basics - Section 17
- Chemical Engineering Basics - Section 18
- Chemical Engineering Basics - Section 19
- Chemical Engineering Basics - Section 20
- Chemical Engineering Basics - Section 21
- Chemical Engineering Basics - Section 22
- Chemical Engineering Basics - Section 23
- Chemical Engineering Basics - Section 24
- Chemical Engineering Basics - Section 25
- Chemical Engineering Basics - Section 26
- Chemical Engineering Basics - Section 27
- Chemical Engineering Basics - Section 28


Chemical Engineering Basics - Engineering
Q1: Heat dissipation in cooling towers is mainly byA conduction
B convection
C evaporation
D radiation
ANS:C - evaporation Evaporation is a process by which a liquid substance changes into a gaseous state when its molecules gain enough energy to overcome the attractive forces holding them together in the liquid phase. This typically occurs at the surface of the liquid. During evaporation, molecules near the surface of the liquid gain sufficient kinetic energy from the surrounding environment (usually heat) to break free from the liquid phase and enter the gas phase. As these molecules escape, they carry away energy, resulting in a cooling effect on the remaining liquid. This is why sweating helps cool the body—it's the result of evaporation of sweat from the skin surface. Several factors influence the rate of evaporation, including temperature, humidity, surface area, and the presence of air movement. Higher temperatures and lower humidity levels generally promote faster evaporation. Additionally, increasing the surface area of the liquid exposed to the surrounding air and enhancing air movement over the liquid surface can also accelerate the evaporation process. Evaporation plays a crucial role in various natural and industrial processes, including the water cycle, drying of wet surfaces, cooling systems such as cooling towers, and the production of salt from seawater, among others. |


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