2007-03-22 05:38:00 · 3 answers · asked by Jewl 2 in Science & Mathematics ➔ Chemistry
Yes. That is, in fact, the definition of a catalyst: a substance that decreases activation energy of a reaction without being consumed in the process.
2007-03-22 05:41:00 · answer #1 · answered by Brian L 7 · 1⤊ 0⤋
yeah... a calalyst decreases the activation energy of a chemical reaction without be consumed.. this is possible by taking another route... for e.g... lets take the example of formation of sulphuric in the atmosphere:
2SO2 + 2H2O + O2 ----> 2H2SO4
The probability of 5 molecules to collide at the same time is very small...
so, this reaction is catalysed by NO2 gas.
SO2 + NO2 -----> SO3 + NO
SO3 + H2O ----> H2SO4
NO + 1/2 O2 ---> NO2
NO2 is used as catalyst and is recovered at the end of the reaction.
2007-03-22 13:10:51 · answer #2 · answered by Krish 5 · 0⤊ 0⤋
"A catalyst is a substance that increases the speed of a reaction.''
For example,
Cl2+2KBr---->2KCl+Br2
this reation takes place in the presence of Mg as a catalyst.
2007-03-22 12:49:11 · answer #3 · answered by Gilly 2 · 0⤊ 2⤋