Learn about the education and preparation needed to become a sales associate. Get a quick view of the requirements and details about schooling, job duties and training necessary to find out if this is the career for you. Sales Associate: Job Description, Requirements and Career Information.
Burning natural gas is exothermic. An exothermic process releases heat, causing the temperature of the surrounding area to rise. Burning gas releases heat and warms whatever is around it, so it's exothermic. An endothermic process absorbs heat and cools the surrounding area.
(The word system can be replaced by the word reaction.) If this result is negative, the reaction is spontaneous. Therefore, in order for an endothermic reaction to be spontaneous, the product of the temperature and change in entropy must be greater than the change in enthalpy.