Home
Class 11
CHEMISTRY
When an ideal gas expands in vaccum, the...

When an ideal gas expands in vaccum, there is neither absorption nor evolution of work ? Why ?

Text Solution

Verified by Experts

It is because no work is done.
i.e., `w = 0 " "w = -p_(ext) xx Delta V = 0 xx Delta V = 0`.
In `Delta U = q + w`
q = 0 because the gas chamber is insulated. `Delta U = 0 + 0 = 0`.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    SUBHASH PUBLICATION|Exercise Numerical problems :|38 Videos

  • CHEMICAL THERMODYNAMICS

    SUBHASH PUBLICATION|Exercise Two marks questions and answers :|47 Videos

  • CHEMICAL EQUILIBRIUM

    SUBHASH PUBLICATION|Exercise NUMERICAL PROBLEMS|34 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    SUBHASH PUBLICATION|Exercise THREE MARKS more than 3 marks|21 Videos

Similar Questions

Explore conceptually related problems

When an ideal gas expands in vacuum, no cooling is observed because the molecules

A sample of an ideal gas escapes into an evacuated container, there is no change in the kinetic energy of the gas. Why?

When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules

2 mole of an ideal gas undergoes a reversible and isothermal expansion from volume of 2.5L to 10L at 27@ C. Calculate the work done by the gas in this expansion.(Given R=8.314j/k/ mol)

Calculate the maximum work obtained when 0.75 mole of an ideal gas expands isothermally and reversibley at 27^(@)C from a volume of 15L to 25 L.

When baking soda is mixed with lemon juice, bubblesare formed with the evolution of a gas. What type of change is it? Explain.

One mole of an ideal gas expands isothermally and reversibles from 5 atmospheres to 1 atmosphere at 50^(@)C . Calculate the work done.

SUBHASH PUBLICATION-CHEMICAL THERMODYNAMICS-Three mark questions and answers
  1. Classify the following processes as reversible or irreversible : Mix...

    Text Solution

    |

  2. Classify the following processes as reversible or irreversible : Mel...

    Text Solution

    |

  3. When an ideal gas expands in vaccum, there is neither absorption nor e...

    Text Solution

    |

  4. Justify the following statements : Reaction with Delta G^() lt 0 al...

    Text Solution

    |

  5. Justify the following statements : Many thermodynamically feasible ...

    Text Solution

    |

  6. Justify the following statements : At low temperatures, enthalpy ch...

    Text Solution

    |

  7. Explain internal energy as a state function.

    Text Solution

    |

  8. Describe the measurement of Delta U by bomb calorimeter.

    Text Solution

    |

  9. Consider the reaction. A + B rarr C + D If the reaction is endotherm...

    Text Solution

    |

  10. Consider the reaction. A + B rarr C + D If the reaction is exothermi...

    Text Solution

    |

  11. Consider the reaction. A + B rarr C + D If the reaction is exothermi...

    Text Solution

    |

  12. Predict in which of the following reactions, entropy increases/decreas...

    Text Solution

    |

  13. Predict in which of the following reactions, entropy increases/decreas...

    Text Solution

    |

  14. Predict in which of the following reactions, entropy increases/decreas...

    Text Solution

    |

  15. Describe the measurement of Delta U by bomb calorimeter.

    Text Solution

    |

  16. Explain change in enthalpy.

    Text Solution

    |

  17. Write the Born-Haber cycle for NaCl.

    Text Solution

    |

  18. Show that entropy as a state function.

    Text Solution

    |

  19. Explain change in entropy of a system during a reversible process Delt...

    Text Solution

    |

  20. Derive Gibb's Helmholtz equation.

    Text Solution

    |