Prep the perimeter. Hand-sand or palm-sand the perimeter of the floor with coarse 180-grit sandpaper. Rub out 4 to 6 inches (10.2 to 15.2 cm) from the edge of the baseboard so that you're sure to cover the areas your mechanical floor sander can't get to. To make a wood paste, mix sawdust with a small amount of white glue to create a paste. 2  Apply paste over the nails with a putty knife and allow to harden before sanding flush with the rest of the floor.
How is an endothermic phase change different from an exothermic phase change? An endothermic phase change is when the substance absorbs energy from its surroundings (melting, vaporization). In an exothermic phase change the substance releases energy tâ¦o its surroundings (freezing, condensation).. 10 people found this useful. Norvellwisdom. 12,735 Contributions.
These are endothermic reactions. Endothermic reactions cannot occur spontaneously. Work must be done in order to get these reactions to occur. When endothermic reactions absorb energy, a temperature drop is measured during the reaction. Endothermic reactions are characterized by positive heat flow (into the reaction) and an increase in enthalpy (+ÎH). Examples of Endothermic and Exothermic Processes Photosynthesis is an example of an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. This reaction requires 15MJ of energy (sunlight) for every kilogram of glucose that is produced: