At Home: Hang Photos or Paintings. Take 30 minutes to hang up those paintings or photos you've got in the back of your closet or around the house. You'll give your home an inexpensive mini-makeover and burn off an extra 107 calories in the process.
An endothermic reaction or process takes place when the system absorbs heat energy from the surrounding environment. In an exothermic reaction or process, energy is released into the environment, usually in the form of heat, but also electricity, sound, or light.
(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.