Home
Class 11
CHEMISTRY
Assertion (A). Spontaneous process is an...

Assertion (A). Spontaneous process is an irreversible process and may be reversed by some external agency.
Reason (R). Decrease in enthalpy is a contributory factor for spontaneity

Text Solution

Verified by Experts

The correct Answer is:
B
Correct explanation. Spontaneous processes are accompaniedby decrease in energy and increasein randomness.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    PRADEEP|Exercise LONG ANSWER QUESTIONS|21 Videos

  • THERMODYNAMICS

    PRADEEP|Exercise ADDITIONAL QUESTIONS(VERY SHORT ANSWER QUESTIONS)|43 Videos

  • THERMODYNAMICS

    PRADEEP|Exercise MATCHING TYPE QUESTIONS|8 Videos

  • STRUCTURE OF ATOM

    PRADEEP|Exercise Competition Focus (JEE (Main and Advanced)/Medical Entrance (IX. Assertion And Reason Type Questions (Type II))|12 Videos

Similar Questions

Explore conceptually related problems

Assertion:Spontaneous process is an irreversible process and may be reversed by some external agency. Reason:Decrease in enthalpy is a conrtributory factor for spontaneity.

What are reversible and irreversible processes? Give some examples of each.

Assertion : An exothermic process which is non-spontaneous at high temperature may become spontaneous at low temperature. Reason : Spontaneous process is an irreversible process and may be reversed by some external agency.

In a spontaneous irreversible process the total entropy of the system and surroundings

Assertion : In a reversible process, DeltaS_("universe") is zero. Reason : Entropy is an extensive property.

Assertion (A): An exothermic process, non-spontaneous at high temperature, may become spontaneous at low temperature. Reason (R ) : With decrease in temperature, randomness (entropy) decreases.

Assertion (A): The thermodynamic factor which determines the spontaneity of a process is the free energy. For a process to be spontaneous the free energy must be-ve. Reason (R ) : The change in free energy is related to the change in a process must always be positive if its is spontaneous.

Assertion : For an isothermal reversible process Q = - w i.e., work done by the system equals the heat absorbed by the system. Reason : Enthalpy change (DeltaH) is zero for isothermal process.