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Gibbs-Helmholtz equation relates the free energy change to the enthalpy and entropy changes of the process as

The magnitude of  does not change much with the change in temperature but the entropy factor  changes appreciably. Thus, spontaneity of a process depends very much on temperature

When  is heated to a high temperature, it undergoes decomposition into and  whereas it is quite stable at room temperature. The most likely explanation of it is

a)

The enthalpy of reaction  overweigths the term  at high temperature

b)

The term  overweigths the enthalpy of reaction at high temperature

c)

At high temperature, both enthalpy of reaction and entropy change become negative

d)

None of these


Question ID - 103875 | Toppr Answer

Gibbs-Helmholtz equation relates the free energy change to the enthalpy and entropy changes of the process as

The magnitude of  does not change much with the change in temperature but the entropy factor  changes appreciably. Thus, spontaneity of a process depends very much on temperature

When  is heated to a high temperature, it undergoes decomposition into and  whereas it is quite stable at room temperature. The most likely explanation of it is

a)

The enthalpy of reaction  overweigths the term  at high temperature

b)

The term  overweigths the enthalpy of reaction at high temperature

c)

At high temperature, both enthalpy of reaction and entropy change become negative

d)

None of these

1 Answer - 5876 Votes

3537

Answer Key : (b) -

(b)

,at high temperature factor dominates of  and hence  becomes negative and reaction occurs spontaneously



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