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Arlecino [84]
3 years ago
7

A substance that speeds up a chemical reaction without being part of the chemical change, itself:

Chemistry
1 answer:
allochka39001 [22]3 years ago
6 0
It is known as a catalyst 
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          To the contrary, heat flows <u> </u><u>out </u>  [heat  <u> may </u><em> </em>exit from or <u> may be </u> released from] an "<u>exothermic</u>" reaction or process.

<u>Hint</u>:  Think of the "prefixes" of:  "<u>endo</u>thermic"  and "<u>exo</u>thermic" :

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  1)  endo- = "within" (as in "endothermic" —heat tends to be absorbed/"within"/"released within"/released within"/into" ;

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Hope this is helpful to you!

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