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CHAP 7/6

QuestionAnswer
RADIOISOTOPE IS FOUND IN IODINE AND HI MOLECULES, THIS SHOWS ... THAT SOME HI MUST HAD DECOMPOSED INTO IODINE AND HYDROGEN.
AT EQUILIBRIUM THE RATIO OF PRODUCT REACTANT CONCENTRATIONS DEFINES POSITION EQUILIBRIUM. E.G. HI HYDROGEN AND IODINE THE POSITION OF EQUILIBRIUM REPRESENTS 9/1. , HI(CONCENTRATION OF HI IN MOL DM-3).
WHEN CALLED EQUILIBRIUM YIELD ... WHEN THE POSITION OF EQUILIBRIUM EXPRESSED AS PERCENTAGE OF REACTANT CONVERTED INTO PRODUCT SQUARE BRACKETS MEANS CONCENTRATION.
EQUILIBRIUM YIELD OF A REVERSIBLE REACTION IS ... THE PERCENTAGE OR FRACTION OF REACTANT THAT IS CONVERTED INTO PRODUCT.
THE ACTUAL YIELD MAY BE ... LESS THAN EQUILIBRIUM YIELD. THIS OCCURS IN OPEN SYSTEM SUCH AS WHEN REACTANT GASES PASS THROUGH CATALYST BED.
WHY MAY GASES NOT REACH EQUILIBRIUM... COZ GASES NOT IN CONTACT WITH CATALYST LONG ENOUGH.
LA CHATELIER’S PRINCIPLE PUT FORWARDS IDEA ... WHEN CONDITION OF A SYSTEM IN EQUILIBRIUM ARE ALTERED , THE POSITION OF THE EQUILIBRIUM ALTERS IN SUCH A WAY AS TO TRY TO RESTORE THE ORIGINAL CONDITIONS.
IF A SYSTEM AT EQUILIBRIUM IS HEATED THE TEMP RISES AND .... THE SYSTEM REACTS TO REMOVE THE HEAT ENERGY AND BRING TEMP DOWN.
MEANS HEAT ENERGY CONVERTED ... INTO CHEMICAL ENERGY. WHEN SYSTEM HEATED.
TO COOL DOWN TEMP WHEN SYSTEM HEATED THE POSITION OF EQUILIBRIUM SHIFTS ..... IN THE ENDOTHERMIC DIRECTION. CAUSING : A DECREASE IN EQUILIBRIUM YIELD FOR EXOTHERMIC REACTION. INCREASE IN EQUILIBRIUM YIELD FOR ENDOTHERMIC REACTION.
THE DECREASE IN TEMP MOVES THE EQUILIBRIUM YIELD... IN THE EXOTHERMIC DIRECTION.
IN THE EXO DIRECTION... CHEM ENERGY CONVERTED TO HEAT
INCREASE IN TEMP SHIFTS ... THE EQUILIBRIUM IN ENDOTHERMIC DIRECTION. TO COOL DOWN.
PREDICT THE EFFECT ON THE POS OF EQUILIBRIUM OF INCREASING THE TEMP : (COLOURLESS)N2O4(G) REVERSE ARROWS (BROWN)2NO2(G) DELTAENTHALPY +58KJMOL-1:.. THE REACTION IS ENDOTHERMIC LEFT TO RIGHT. INCREASE TEMP MOVE THE POS OF EQUILIBRIUM IN THE ENDOTHERMIC DIRECTION TO RIGHT THUS CAUSING MORE OF THE DINITROGEN TETROXIDE TO DECOMPOSE.
THE REACTION IS ENDOTHERMIC.... LEFT TO RIGHT.
WHAT COLOUR DINITROGEN TETROXIDE.... IS COLOURLESS GAS.
WHTA COLOUR NITROGEN DIOXIDE IS ... A BROWN GAS.
WHEN THE COLOURLESS ONE IS HEATED... THE GAS DARKENS AND NO2 IS FORMED.
PREDICT EQUILIBRIUM POS OF INCREASING THE TEMP IN AMMONIA REACTION... THE REACTION IS EXOTHERMIC FORM LEFT TO RIGHT. AN INCREASES IN TEMP WILL MOVE THE POS OF EQUILIBRIUM IN THE ENDO DIRECTION WHICH IS LEFT THUS REDUCING THE EQUILIBRIUM YIELD OF AMMONIA.
AN INCREASE IN TEMP SPEEDS THE .... ENDOTHERMIC REACTION IN EQUILIBRIUM MORE THAN EXOTHERMIC.
Created by: ufuoma
 

 



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