Welcome, Guest
Please Login or Register.    Lost Password?

chemistry doubts from chemical kinetics...............
(1 viewing) (1) Guest
Go to bottomPage: 1
TOPIC: chemistry doubts from chemical kinetics...............
#102892

chemistry doubts from chemical kinetics............... 3 Years, 12 Months ago

 

Q.1)  THE DECOMPOSITION OF Cl2OAT 400KIN GASEOUS PHASE TO Cl& OIS OF 1ST ORDER.AFTER 55 SEC,AT 400K THE PRESSURE OF REACTION MIXTURE INCREASES FROM 0.62 TO 1.88 ATM. CALCULATE THE RATE CONSTANT FOR THE GIVEN REACTION, ALSO CALCULATE THE PRESSURE OF REACTION AFTER 100SEC.

Q.2)  FIND OUT THE % OF THE REACTANT MOLECULES CROSSING OVER THE ACTIVATION ENERGY BARRIER AT 325K GIVEN THAT    H325 = 0.12KCAL ,Ea(b) = +0.02kcal.
Q.3)  A QUANTITY OF ETHYL ACETATE IS MIXED WITH AN EXCESS OF SODIUM HYDROXIDE AT 298K . 100 c.c OF MIXTURE IS IMMEDIATELY TITRATED AGAINST 0.05N HCL ACID, OF WHICH 75c.c WERE REQUIRED FOR NEUTRALIZATION. AFTER 30 MINUTES, 50 c.c OF THE MIXTURE REQUIRED , SIMILARLY  25 c.c OF ACID. WHEN ORIGINAL REACTION OF ESTER WAS COMPLETE , 25 c.c OF THE MIXTURE REQUIRED 6.25 c.c OF THE ACID. CALCULATE THE 2nd ORDER VELOCITY CONSTANT( AT t=0) OF THE REACTION , USING CONCENTRATION IN MOLES PER LITRE AND TIME IN MINUTES. REACTION IS FIRST ORDER EACH W.R.T. NaOH & ESTER. INDICATOR CHOSEN FOR ABOVE REACTION IS SUCH THAT, IT GIVES END POINT WHEN HCL ACID REACTS WITH NAOH ONLY.
( given log2 = 0.30,log3=0.48.ln 10 = 2.3)
Q.4)  AN ORGANIC COMPOUND DISSOCIATES INTO n PARALLEL 1st ORDER REACTIONS SIMULTANEOUSLY AND PRODUCES n DIFFERENT PRODUCTS P, P2 , P, P4 ,..........,P, HAVING RATE CONSTANTS K,2K,3K,4K,........,nK AND ACTIVATION ENERGIES E,2E,3E,4E,.......,nE RESPECTIVELY. CALCULATE OVERALL ENERGY OF ACTIVATION OF THE COMPOUND P.
 
Q.5)  FOR AN ISOMERISATION REACTION A = B (IN PRESENCE OF CATALYST) IN GASEOUS PHASE, THE EQUILIBRIUM CONSTANT AT 333K IS 3.60 . BOTH FORWARD AND BACKWARD REACTIONS ARE OF 1st ORDER. STARTING WITH AN INITIAL PRESSURE OF P atm OF A, PRESSURE BECAME 0.25P atm IN 40 MINUTES. FIND THE VALUE OF INDIVIDUAL RATE CONSTANTS FOR THE FORWARD AND BACK WARD REACTIONS.
Q.6) THE FORMATION OF d-POTTASIUM CHROMO-OXALATE FROM Its - FORM IS REVERSIBLE REACTION WHICH IS FIRST ORDER IN BOTH DIRECTIONS, THE RACEMATE BEING THE EQUILIBRIUM PRODUCT. A POLARIMETER EXPERIMENT AT 295K SHOWED THAT AFTER 506 SEC, 12 mole % OF l - ISOMER WAS CONVERTED TO THE d - FORM.
FIND THE RATE CONSTANT FOR FORWARD REACTION, AS WELL AS BACK WARD.




ANISH (User)
Fresh ECian
Posts: 1
graphgraph
User Offline Click here to see the profile of this user
Please Login to Post a Reply .
 
Go to topPage: 1
Moderators: