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.
Here are 7 destinations you should plan a vacation while the U.S. dollar is strong. Norway plans to build the world's first tunnel for ships. A 5,610-feet passageway burrowed through a piece of rocky peninsula will allow vessels to avoid a treacherous part of sea. It will be 118 feet wide and 162 feet tall and is estimated to cost at least $314 million. It is expected to open in 2023.