1) Which of the following is a true statement about chemical equilibrium in gene
ID: 775127 • Letter: 1
Question
1) Which of the following is a true statement about chemical equilibrium in general:
a) There is only one set of equilibrium concentration that equals the Kc value.
b) At equilibrium, the rate of the forward process is the same as the rate of the reverse process.
c) At equilibrium, the total concentration of products equals the total concentration of reactants, that is products=reactants.
d) Equilibrium is the result of the termination of all chemical change.
2) Which of the following will change the value of an equilibrium constant?
a) adding other substances that do not react with any of the species involved in the equilibrium.
b) changing temperature
c) varying the initial concentrations of reactants.
d) varying the inintial concentration of products
CHOOSE BEST ANSWER AND EXPLAIN WHY YOU CHOSE THIS ANSWER
Explanation / Answer
1) the true statement is :-
b) At equilibrium , rate of forward reaction is same as the rate of reverse process
Chemical equilibrium is a dynamic equilibrium in which reaction continues even after reaching the equilibrium state.But at the state of equilibrium, the rate of formation of products is equal to the rate of formation of reactants
2) Value of Equilibrium Constant (KC) depends only upon the temperature & enthalpy of the reaction.Thus,, the correct statement is :-
b) changing temperature
The relation which proves my answer is:-
ln(k2/k1) = (deltaH/R)*[(1/T1) - (1/T2)] ; where T1 & T2 are temperatures in Kelvin and K1 & K2 are equilibrium constants at temeprature T1 & T2 respectively.
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