Forming a chemical bond releases energy and therefore is an exothermic process. Exothermic reactions usually feel hot because it is giving heat to you. Endothermic-a process or reaction that absorbs energy in the form of heat. Breaking a chemical bond requires energy and therefore is Endothermic.
karma level 71199. The Seikan Tunnel is a 53.85 km (33.46 mi) railway tunnel in Japan, with a 23.3-kilometre (14.5 mi) long portion under the seabed. Track level is about 140-metre (460 ft) below seabed and 240-metre (790 ft) below sea level. It is the longest undersea tunnel in the world, although the Channel Tunnel between the United Kingdom and France has a longer under-sea portion.
Sign In. SH101 is an ongoing column on SmartShanghai, in which our writers actually visit tourist destinations in Shanghai weâve all heard about, ignored, driven by, or thought about going to but never did. Until right now. You start seeing the signs as soon as you step off of Line 2 at Lujiazui Station: Shanghai Ocean Aquarium! The longest underwater tunnel in the world! Follow them to exit 2, and itâs a short walk to the aquarium itself, which is unobtrusively seated a stoneâs throw away from the Pearl Tower.