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.
The semester system divides the calendar year into two semesters of 16 to 18 weeks each, plus summer sessions of varying lengths. The two semesters together constitute 32 to 36 weeks of instruction, so that three academic quarters equal two academic semesters. Thus, academic credit earned in quarter hours converts to semester hours at 2/3 of its value, while credit earned in semester hours converts to quarter hours at 3/2 of its value.