plz answer, this is a homework---hehehe
2007-02-02 21:58:32 · 9 answers · asked by lfc_kilo 1 in Science & Mathematics ➔ Chemistry
Exothermic reactions(heat given out):
Production of ammonia (Haber process)
Production of sulpuric acid (Contact process)
Combustion reactions
Neutralization reactions
Endothermic reactions(heat absorbed):
Decomposition of photographic film
Decomposition of CFCs
Decomposition of calcium carbonate in blast furnace
Production of Nitrogen Dioxide in car engine
Photosynthesis
**Actually I just learnt this in school. HAHAHA!!**
2007-02-02 22:05:19 · answer #1 · answered by Gaara of the Sand 3 · 0⤊ 0⤋
exothermic reactions give out/produce heat while endothermic absorb heat from the environment. So theoretically if you were to put a test tube containing an exothermic reaction in a sealed jar and do the same with an endothermic reaction, at the end of the reaction once you have removed the test tubes the one containing the exothermic reaction would be filled with warm air and the one containing the endothermic reaction would be filled with cool air.
examples of exothermic reactions are;
the digestion of food,
explosions,
the sun.
an example of an endothermic reactions is;
an ice pack.
2007-02-03 07:46:49 · answer #2 · answered by The High Inquisitor 4 · 0⤊ 0⤋
Examples of exothermic reactions:
Digestion of food releases energy
All combustion reactions (fires)
Adding an alkali metal to water
Condensation of water
Explosion of bombs
Endothermic Reactions
Examples of endothermic reactions:
Melting of ice absorbs energy
Dissolving ammonium nitrate in water( the essence of commercial cold packs)
2007-02-03 06:07:29 · answer #3 · answered by BARROWMAN 6 · 0⤊ 0⤋
Mixing a strong acid and a strong base (like Sulfuric acid and Bleach) will produce a strong exothermic reaction ... boom!
Mixing ammonium nitrate in water is endothermic (it takes a lot of energy for the nitrates to bond with the water), and this creates cold water. This is used in coldpacks for injuries ... a breakable capsule of ammonium nitrate is packed inside a water/gel bag.
Hope that helps.
2007-02-03 06:09:55 · answer #4 · answered by Grendle 6 · 0⤊ 0⤋
Adding Sodium Hydroxide (Caustic Soda) pearls or flakes to water produces heat, thus is an exothermic reaction.
Adding salt (Sodium Chloride) to water causes the temperature of the solution to drop, thus is an endothermic reaction. This reaction is what causes ice to melt when salt is poured onto it.
2007-02-03 06:03:45 · answer #5 · answered by Phish 5 · 1⤊ 0⤋
Just quickly sodium cloride into water although IS NOT a reaction it is simply disolving.
Previously I wrote that the haber process is endothermic it is in fact exothermic I do appoloigise.
2007-02-03 06:14:54 · answer #6 · answered by babsatult 2 · 0⤊ 0⤋
Exothermic reactions produce (heat) Energy,
Endothermic reactions absorb energy.
2007-02-03 06:03:19 · answer #7 · answered by Roshu 1 · 0⤊ 2⤋
Exo- burning, neutraling of water and alcaline, reaction between active metal and acid, adding water to thick acid and metal oxide, reaction between acid and carbonate, respiration
Endo- the heating of dry salt, reaction between acid and hydrogen carbonate, photosynthesis
I hope this helps. :)
2007-02-03 06:05:44 · answer #8 · answered by Juni Mccoy 3 · 0⤊ 0⤋
take two stems of alittle plant then cut the end portions of two stems
equaly with a blade then take two mugs then pour water in two then put salt in one and stear well the put two stems in each .after an hour you can see that stem in the pour water is helthier compared to saltwater the prosses in water is ENDOTHERMIC and prosses in saltwater is EXOTHERMIC.
2007-02-03 06:14:53 · answer #9 · answered by apoos 2 · 0⤊ 0⤋