11 May at the science classes we learned responses endoenergetyczne, egzoenergetyczne, endothermic and exothermic. At the beginning of classes saw what is going on in our crystal .. and we were pleasantly surprised! Crystals of us came out GREAT!! Then wylaliśmy residual solution, and our crystals moved to a Petri dish. Osuszyliśmy our crystals and compared with the substances prior to crystallization (we bought you a fancy camera, so we did a few bajeranckich photos that we put on our blog.)
our next task was to perform the reaction and thermal energy. In the experiment with sodium thiosulfate tube "wariowały" again became warm, and sometimes cold. High recognition in our eyes got sulphate of copper (II), because under the influence of heat lost his beautiful blue color. However, after adding a few drops of water to recover it again, and the evaporator had become hot.
So ...
endoenergetyczna reaction - a chemical reaction that absorbs energy from the environment in any form.
egzoenergetyczna reaction - a chemical reaction which resulted in releases to the environment energy. in any form.
endothermic reaction a chemical reaction, which has a negative balance of heat exchange with the environment. You can also say that this is a reaction in which heat is located on the substrate, or else that absorbs heat from the environment.
exothermic reaction is a chemical reaction , which has a positive balance of heat exchange with the environment. You can also say that this is a reaction in which heat is on the product page, or else that emits heat.
At the end of class, during the cleaning we had the idea to make your own solution ...., and what came out is our secret sweet;)))
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