CATALYSTS

COMPOUNDS CALLED CATALYSTS SPEED UP A CHEMICAL REACTION BY HELPING SUBSTANCES REACT TOGETHER.THE CATALYSTS ARE LEFT UNCHANGED BY THE REACTION.MANY CARS ARE FITTED WITH A CATALYTIC CONVERTER TO REMOVE POLLUTING GASES FROM ENGINE FUMES.THE CONVERTER FORCES THE GASES INTO CLOSE CONTACT WITH CATALYSTS.THE CATALYSTS MAKE THE GASES REACT RAPIDLY WITH EACH OTHER,PRODUCING LESS HARMFUL GASES THAT ESCAPE OUT OF THE EXHAUST PIPE.