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KINETICS/2
Question | Answer |
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CQN INCREASE PRESSURE BY ... REDUCING VOLUKE OF CONTAINER. PUMPING MORE REACTANT GAS INTO CONTAINER . INCREASED PRESSURE OF GAS PARTICLES PER CM3 SO FREQ PF COLLISONS INCREASES. | |
INCREASES THE PRESSURE CAUSES ... THE AVERAGE KINETICA ENERGY O PARTICLES TO.REMIAN THE SAME BUT MORE COLLISIONS PER SECOND RATE. | |
FOR REACTIONS IN SOLUTION AN INCREASE CONC... CAUSES INCREASE INNNER REACTION RATE... HOGHER CONC OF SOLUTION MORE COLLISIONS. | |
SUCCESSFULCOLLISIONS RESULT IN ... FASTER RATE OF REACTION. | |
DOUBLE CONC OF ONE REACTANT CAUSES... RATE OF REACTION TO DOUBLE. | |
A HOMOGENOUS REACTION ...? IS ONE THAT TAKES PLACE IN A SINGLE PHASE. SO FREQ OF COLLISIONS INCREASE. | |
IF ZINC POWDERED SURFACE AREA INCREASES AND ... HYDROGEN!!! GAS FORMS QUICKER. | |
HETEROGENOUS CATALYST ARE DESIGNED ... WITH PARGE SURFACE A GREATER CHANCE OF COLLISIONS BETWEEN REACTION MOL AND CATALYST . | |
INCREASE TEMP MOLS HAVE HIGHER KINETIC ENERGY. SO MORE MOLECUOES POSSESS ACTIVATION ENERGY. AREA UNDER EA LINE BIGGER COZ MORE SUCCESSFUL COLLIONS & FASTER RATE. | |
INCREASE IN 10 DEGREES CAUSES RATE OR REACTION TO... DOUBLE | |
AREA UNDER CURVE TO THE RIGHT OF THE ACTIVATION ENERGY ... IS FRACTION OF MOLECULE THAT HAVE ENPUGH ENERGY FOR COLLISION TO BE SUCCESSFUL. | |
IF RAISED BY 10 DEGREES... THE COLLISION FREQUENCY RAISED BY 1% RESUKTS FROM NO OF MOL WHO POSSESS ACTIV ENERY EQUAL OR GREATER. | |
HOW DO CATALYST SPEED UP A REACTION... BY PROVIDIBG AN ALTERNATIVE PATHWAY WITH LOWER ACTIVATION ENERGY. | |
HOMOGENOUS CATALYST ONE.. IN SAME PHASE AS REACTANTS E.G. FE2+ ION CATALYST IN OXIDATION OF IODINE IONS BY PERSULPHATE IONS | |
THE HOMOGENOUS CATALST WORKS BY REACTING .. WITH ONE OF REACTANTS TO FORM INTERMEDIATE COMPOUND STOLE 4 OXYGENS AND ONE SULPHUR BECOMES FE3+ | |
THE INTERMEDIATE COMPOUND THEN.. REACTS WITH OTHER COMPOUND TO REFPRM CATALYST & CHANGES I TO SOLID FROM AQ. | |
POINT OF USING CATALYST AVOIDS... NECCESSITY OF COLLISON BETWEEN 2 NEG COMPOUNDS. | |
HETEROYENOUS CATALYSTS:- ONE IN DIFF PHASE TP REACTANTS E.G. IRON IN HABER PROCESS. N2(G)+ 3H2 --> 2NH3(G) HETEROGENOUS CATALYST PROMOTES REACTION THROUGH ACTIVE SITE. PLACES ON SURAFACE OF CATALYST WHERE REACTANTS CAN BOND. | |
GASEOUS REACTANTS + ACTIVE SITES= ABSORB REACTANTS . ABSORBED REACTATS ABSORB PRODUCTS. AB PRODUCTS --> GASEOUS PRODUCTS + FREE ACTIVE SITES. FEWER ACTOVE SITES THAN REACTANST MOLECULES SO INCREASE PRESSURE MAKES NO DIFFERNCE ALL ACTIVE SITE OCCUPIED | |
HOW CATALYST WORK... CAN BE EXPLAINED USING MAXWELL BOLTMANN DIAGRAM . PRESENCEOF CATALYST DOESNT ALTER THE AVERAGE KINETIC ENERGY. BUT LOWER !!!! ACTIVATION ENERGY. | |
CATALYS ECAT LARGER AREA UNDER GRAPH. MORE MOLECULES POSSES AMOUNT OF ENERGY. | |
ENZYMES CATALYST? MORE THAN ONE ACTIVE SITE. SUBSTRATE BINDS LIKE LOCK AND KEY. GLOBULAR PROTIENS. | |
CHEM BINDING IRREVERSIBLY TO LOCK&KEY.. CAN POISON IT. | |
BUT ADV OF POISONING ENZYMES... IF BINDS TO ACTIVE SITE FOR HIV E.G. HIV PROTEASE. PREVENT DEVELOPEMENT OF AIDS. | |
IN HETERGENOUS REACTION INCREASED SURFACE AREA |