Home
Class 11
CHEMISTRY
van't Hoff equation is...

van't Hoff equation is

A

`(d//dT) ln K=-DeltaH//RT^(2)`

B

`d//dT (ln K)=+DeltaH//RT^(2)`

C

`(d//dT) ln K=-DeltaH//RT`

D

`K=Ae^(-DeltaH//RT)`

Text Solution

Verified by Experts

The correct Answer is:
B, D

The van't Hoff equation is `K=Ae^(-DeltaH//RT)`
or `(d ln K)/(delT)=(DeltaH)/(RT^(2))`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CHEMICAL EQUILIBRIUM

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Single Correct)|58 Videos
  • CHEMICAL EQUILIBRIUM

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Assertion-Reasoning)|15 Videos
  • CHEMICAL EQUILIBRIUM

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Linked Comprehensive)|54 Videos
  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Subjective|15 Videos
  • CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    CENGAGE CHEMISTRY ENGLISH|Exercise Analytical and Descriptive Type|3 Videos

Similar Questions

Explore conceptually related problems

Derive van't Hoff's equation for dilute solution.

Derive van't Hoff's equation for the concentration dependence of the osmotic pressure of a non-volatile solute.

Knowledge Check

  • For which of the following solutes the van't Hoff factor is not greater than one ?

    A
    `NaNO_3`
    B
    `BaCl_2`
    C
    `K_4[Fe(CN)_6]`
    D
    `NH_2CONH_2`
  • Which of the following representations of I (van't Hoff factor) is not correct ?

    A
    `i="Observed colligative property"/"Expected colligative property"`
    B
    `i="Normal molecular mass "/"Observed molecular mass "`
    C
    `i="Number of molecules actually present "/"Number of molecules expected to be present "`
    D
    `i="Total number of particles taken before association/dissociation"/"Number of particles after association/dissociation"`
  • Similar Questions

    Explore conceptually related problems

    Variation of equilibrium constan K with temperature is given by van't Hoff equation InK=(Delta_(r)S^(@))/R-(Delta_(r)H^(@))/(RT) for this equation, (Delta_(r)H^(@)) can be evaluated if equilibrium constans K_(1) and K_(2) at two temperature T_(1) and T_(2) are known. log(K_(2)/K_(1))=(Delta_(r)H^(@))/(2.303R)[1/T_(1)-1/T_(2)] Select the correct statement :

    Variation of equilibrium constan K with temperature is given by van't Hoff equation InK=(Delta_(r)S^(@))/R-(Delta_(r)H^(@))/(RT) for this equation, (Delta_(r)H^(@)) can be evaluated if equilibrium constans K_(1) and K_(2) at two temperature T_(1) and T_(2) are known. log(K_(2)/K_(1))=(Delta_(r)H^(@))/(2.303R)[1/T_(1)-1/T_(2)] Variation of log_(10) K with 1/T is shown by the following graph in which straight line is at 45^(@) hence DeltaH^(@) is :

    Variation of equilibrium constan K with temperature is given by van't Hoff equation InK=(Delta_(r)S^(@))/R-(Delta_(r)H^(@))/(RT) for this equation, (Delta_(r)H^(@)) can be evaluated if equilibrium constants K_(1) and K_(2) at two temperature T_(1) and T_(2) are known. log(K_(2)/K_(1))=(Delta_(r)H^(@))/(2.303R)[1/T_(1)-1/T_(2)] For an isomerization X(g)hArrY(g) the temperature dependency of equilibrium constant is given by : lnK=2-(1000)/T The value of Delta_(r)S^(@) at 300 K is :

    Variation of equilibrium constan K with temperature is given by van't Hoff equation InK=(Delta_(r)S^(@))/R-(Delta_(r)H^(@))/(RT) for this equation, (Delta_(r)H^(@)) can be evaluated if equilibrium constants K_(1) and K_(2) at two temperature T_(1) and T_(2) are known. log(K_(2)/K_(1))=(Delta_(r)H^(@))/(2.303R)[1/T_(1)-1/T_(2)] The equilibrium constant Kp for the following reaction is 1 at 27^(@)C and 4 at 47^(@)C. A(g)hArrB(g)+C(g) For the reaction calculate enthalpy change for the B(g)+C(g)hArrA(g) (Given : R=2cal//mol-K)

    Van't Hoff's equation for a chemical reaction under equilibrium is given by standard reaction enthalpy at temperature T and K is the equilibrium constant . Predict how K will vary with temperature for an exothermic

    Give one example each when van't Hoff factor is 2 and (1)/(2) .