If a reaction requires a constant input of energy, the products are higher in energy than the reactants. This type of reaction is known as endothermic, since it involves an increase in energy of the system. Conversely, reactions that release energy are known as exothermic.
Best Answer: The length of a semester varies per institution. For most colleges/universities, a typical Fall or Spring semester is between 14 and 16 weeks.Summer terms are shorter and more varied; some courses last 3 or 4 weeks whereas others might last 10 or 12 weeks.Source(s): college instructor.or most colleges/universities, a typical Fall or Spring semester is between 14 and 16 weeks. Summer terms are shorter and more varied; some courses last 3 or 4 weeks whereas others might last 10 or 12 weeks. Source(s): college instructor.
A semester (from the Latin meaning six-monthly) has come to mean either of two academic terms, generally excluding the summer or January terms, if any, and so can be 12 to 20 weeks long. The word semester is sometimes used as a synonym for a term, as in a summer semester. second term lasts from early September to late December with a two-week-long break for New Year's at the end of the year. The term is followed by a third term from early January to late March and a brief week-long spring break. The graduation ceremony occurs in March, and the enrollment ceremony in early April.