Explain what it means for a reaction to be endothermic and what would happen to the temperature recorded by a thermometer in an endothermic reaction.
it would be absorbing or gaining heat so that the temperature raises
An endothermic reaction needs energy to proceed, such energy is usually taken from the environment surrounding the reaction. In the typical case this energy is expressed as heat. Heat is an state of atomic activity, that energy is transferred to an ENDOthermic reaction so the initial threshold of reaction is overcome and the final reaction can occur.
A thermometer immersed in such endothermic reaction would show a reduction of the temperature, because the own thermometer's temperature is taken from it to the reaction.
All the opposite is the case for an EXOthermic reaction, it would increase the temperature of its environment, because the reaction itself is releasing energy to proceed.
Endo=toward inside. Exo=toward outside. But what is moved is heat.
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