Home
Class 12
CHEMISTRY
The enthalpy change for a given reaction...

The enthalpy change for a given reaction at `298 K` is `-x cal mol^(-1)`. If the reaction occurs spontaneously at `298 K`, the entropy change at that temperature

A

can be negative but numerically larger than `X//298`

B

can be negative bu numerically smaller than `X//298`

C

cannot be negative

D

cannot be positive

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-3 Part:(III) : Match the column|3 Videos
  • THERMODYNAMICS

    RESONANCE|Exercise exercise-2 Part:(I) :Only one option correct|18 Videos
  • THERMODYNAMICS

    RESONANCE|Exercise exercise-3 Part-3 :(Only one option correct type) section B|12 Videos
  • TEST SERIES

    RESONANCE|Exercise CHEMISTRY|50 Videos

Similar Questions

Explore conceptually related problems

The entropy change for eaction at 300 K is 120 Jk^(-1) mol^(-1) . What is the enthalpy change for the reaction ?

Preidict which of the following reactions would not procees spontaneously at 298 K

Predict which of the following reactions would proceed spontaneously at 298K?

The entropy chnge for a non-spontaneous reaction is 140 J/K.mole at 298 K. The reaction is_____________.

Gibbs-Helmoholtz equation relates the free energy change to the enthalpy and entropy changes of the process as (DeltaG)_(PT) = DeltaH - T DeltaS The magnitude of DeltaH does not change much with the change in temperature but the enrgy factor T DeltaS changes appreciably. Thus, spontaneity of a process depends very much on temperature. The enthalpy change for a certain reaction at 300K is -15.0 kcal mol^(-1) . The entropy change under these conditions is -7.2 cal K^(-) mol^(-1) . The free enegry change for the reaction and its spontaneous//nonspontaneous character will be

The oxidation of iron occurs as: 4Fe(s) + 3 O_(2)(g) to 2Fe_(2)O_(3)(s) The enthalpy of formation of Fe_(2)O_(3) is - 824.2 kJ mol^(-1) and entropy change for the reaction is -549 J K^(-1) mol^(-1) at 298 K. Inspite of negative entropy change of this reaction, why is the reaction spontaneous at 298 K?