Home
Class 12
CHEMISTRY
What are DeltaG, DeltaH and Delta S for ...

What are `DeltaG, DeltaH and Delta S` for addorption of gas on solid adsorbent ?

Text Solution

AI Generated Solution

To analyze the adsorption of a gas on a solid adsorbent, we need to determine the values of ΔG (Gibbs free energy change), ΔH (enthalpy change), and ΔS (entropy change). Here’s a step-by-step explanation: ### Step 1: Understanding the Process Adsorption is the process where gas molecules adhere to the surface of a solid. This process can be considered as a physical or chemical interaction between the gas and the solid. ### Step 2: Analyzing ΔS (Entropy Change) - **Entropy (ΔS)**: Entropy is a measure of disorder in a system. When gas molecules are adsorbed onto a solid surface, the number of available microstates decreases because the gas molecules are now restricted in movement. - **Conclusion**: As a result, the entropy of the system decreases. Therefore, ΔS is negative. ...
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    PRADEEP|Exercise SHORT ANSWER QUESTIONS (I. ADSORPTION)|12 Videos
  • SURFACE CHEMISTRY

    PRADEEP|Exercise SHORT ANSWER QUESTIONS (II. CATALYSIS)|9 Videos
  • SURFACE CHEMISTRY

    PRADEEP|Exercise LONG ANSWER QUESTIONS|8 Videos
  • SOME BASIC CONCEPTS OF CHEMISTRY

    PRADEEP|Exercise Competition (FOCUS) JEE (Main and Advanced)/Medical Entrance SPECIAL (VIII. Assertion-Reason Type Questions)(Type II)|13 Videos

Similar Questions

Explore conceptually related problems

The EMF of Westron standard cell is 1.0153 at 20^(@)C and 1.01807 at 25^(@)C . Calculate DeltaG,DeltaH, and Delta S for the cell reaction at 25^(@)C .

Under what condition of DeltaG, DeltaH or DeltaS , a reaction will be spontaneous at all temperature?

Liquid water is injected into an oven at 400 k. What are the signs for DeltaG,DeltaH, DeltaS for the physical transformation that occurs ?

A: Hexane and heptane forms ideal solution. R: DeltaH,DeltaS and DeltaG are zero for such type of solution.

How do size of particles of adsorbent, pressure of gas and prevailling temperature influence the extent of adsorption of a gas on a solid ?

Which of the following is true during adsorption? a. DeltaG , DeltaH , and DeltaS all are negative. b. DeltaG is negative, but DeltaH and DeltaS is positive. c. DeltaG and DeltaH are negative, but DeltaS is positive. d. DeltaG and DeltaS are negative, but DeltaH is positive.

Assertion : For adsorption DeltaG, DeltaH, DeltaS all have –ve values Reason : Adsorption is a spontaneous exothermic process in which randomness decreases due to force of attraction between adsorbent and adsorbate.

PRADEEP-SURFACE CHEMISTRY -ADDITIONAL QUESTIONS (VERY SHORT ANSWER QUESTIONS)
  1. Explain the meaning of the statement 'Adsorption is a surface phenomen...

    Text Solution

    |

  2. What are DeltaG, DeltaH and Delta S for addorption of gas on solid ads...

    Text Solution

    |

  3. What is 'occulsion'?

    Text Solution

    |

  4. What do you mena by specific surface area of an adsorbent ?

    Text Solution

    |

  5. Which will adsorb more gas, a lump of charcoal or its powder and why ?

    Text Solution

    |

  6. What is physical adsorption.

    Text Solution

    |

  7. Why is chemisorption irreversible ?

    Text Solution

    |

  8. What is meant by chemical adsorption?

    Text Solution

    |

  9. Of physisorption and chemisorption which type of adsorption has a high...

    Text Solution

    |

  10. Give the expression of Freundlich isotherms.

    Text Solution

    |

  11. What from Freundich adsorption isotherm equation will take at high pre...

    Text Solution

    |

  12. How does increase in tempeature affect both physical and chemical adso...

    Text Solution

    |

  13. Write one similarity between physisorption and chemisorption.

    Text Solution

    |

  14. Define shape selective catalysis. Give an example of a shape selective...

    Text Solution

    |

  15. What is ZSM-5 ? What is its formula ?

    Text Solution

    |

  16. Name two industrial processes in which heterogeneous catalysts are emp...

    Text Solution

    |

  17. Indicate a chemical reaction involving a homogeneous catalyst.

    Text Solution

    |

  18. Write down the heteroheneous catalyst involved in the polymerisation o...

    Text Solution

    |

  19. What is the role of desorption in the process of catalysis ?

    Text Solution

    |

  20. What is the range of particle size in colloidal solution in nm?

    Text Solution

    |