well... neither.. Endothermic means an organism produces it's own heat, like humans, mamals birds etc. Exothermic means they need to get it from the environment, like reptiles. Thermo always refers to temperature in general. (but not specifically heat or cold)
1 year ago
Last edited at 9:39PM on 12/20/2012
Exothermic reactions make a test tube feel hot as they give OUT heat Endothermic reactions (rarer) make a test tube feel cold as they draw IN heat energy.
For endothermic, most schools dissolve sodium thiosulphate in water and get a very cold test tube. Boiling water is endothermic, it takes heat energy in to make high energy water molecules (water vapour)
An endothermic reaction would feel cold, because the object is taking heat and making it into chemical bonds instead. That is the principle used for those ice packs where you break the seal and shake them to make them colder. Exothermic reactions produce heat, so they would feel warm to the touch.
During an endothermic chemical reaction heat is absorbed in the process of a solute being dissolved in a solvent. A simple example I have seen often is when making a solution of potassium iodide in water. The graduate used to make the solution gets so cold that water from the air condenses on the outside.
Endothermic what? Many organisms are endothermic, and endo is just a term dressed in a prom dress, thermionic means heat. Everyone's given you what you need, this is just the version in case you need a bit of an explanation that is appropriate for your class. Expand on this if you need to if it's easier for you. Sometimes you don't need too much terminology to get your point across. good luck:)