Home
Class 12
CHEMISTRY
A sample of argon gas at 1 atm pressure ...

A sample of argon gas at 1 atm pressure and 27°C expands reversibly and adiabatically from `1.25 dm^(3)` to `2.50 dm^(3)`. Calculate the enthalpy change in this process `C_(vm)` for argon is `12.48 JK^(-1) mol^(-1)`.

Text Solution

Verified by Experts

`-116.4` J
`DeltaH = nC_(p) DeltaT`
`T_(1)V_(1)^(gamma-1) = T_(2)V_(2)^(gamma-1) rArr gamma = C_(p)/C_(p)`
`C_(p) = (5R)/2, C_(v) = (3R)/2`, for He Ar
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise JEE (MAIN ARCHIVE)|32 Videos

  • THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise JEE ADVANCED (ARCHIVE)|31 Videos

  • THERMODYNAMICS & THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise Impeccable|48 Videos

Similar Questions

Explore conceptually related problems

A sample of argon gas at 1atm pressure and 27^(@)C expands reversibly and adiabatically from 1.25 dm^(3) to 2.50 dm^(3) . Calculate the enthalpy change in this process. C_(v,m) for argon is 12.48J K^(-1) mol^(-1) .

A sample of argon gas at 1atm pressure and 27^(@)C expands reversibly and adiabatically from 1.25 dm^(3) to 2.50 dm^(3) . Calculate the enthalpy change in this process. C_(vm) for orgon is 12.48J K^(-1) mol^(-1) .

A sample of organ gas at 1atm pressure and 27^(@)C expands reversibly and adiabatically from 1.25 dm^(3) to 2.50 dm^(3) . Calculate the enthalpy change in this process. C_(vm) for orgon is 12.48J K^(-1) mol^(-1) .

5 mol of an ideal gas expands reversibly from a volume of 8 dm^(3) to 80 dm^(3) at a temperature of 27^(@)C . Calculate the chngae in entropy.

5 mol of an ideal gas expand reversibly from a volume of 8 dm^(3) to 80 dm^(3) at an temperature of 27^(@)C . Calculate the change in entropy.

1 mole of an ideal gas at 25^(@) C is subjected to expand reversibly and adiabatically to ten times of its initial volume. Calculate the change in entropy during expansion (in J K^(-1) mol^(-1) )

One mole of an ideal gas is allowed to expand reversible and adiabatically from a temperatureof 27^(@)C) if the work done during the process is 3 kJ,the final temperature will be equal to (C_(v)=20JK^(-1))

Calculate the entropy change when 2 mol of an idela gas expand isothermally and reversibly from an initial volume of 2 dm^(3) to 20 dm^(3) at 300 K .

A gas (C_(v.m) = (5)/(2)R) behaving ideally is allowed to expand reversibly and adiabatically from 1 litre to 32 litre. Its initial temperature is 327^(@)C . The molar enthalpy change (in J//mol ) for the process is :

One moles of an ideal gas which C_(V) = 3//2 R is heated at a constant pressure of 1 atm from 25^(@)C to 100^(@)C . Calculate DeltaU, DeltaH and the entropy change during the process.

VMC MODULES ENGLISH-THERMODYNAMICS-JEE ADVANCED (ARCHIVE)
  1. Enthalpy is an ……………….. property.

    Text Solution

    |

  2. When Fe(S) is dissovled in aqueous hydrochloric acid in a closed vesse...

    Text Solution

    |

  3. A sample of argon gas at 1 atm pressure and 27°C expands reversibly an...

    Text Solution

    |

  4. The heat absorbed during the isothermal expansion of an ideal gas agai...

    Text Solution

    |

  5. Show that the reaction CO(g)+ 1/2 O(2)(g) to CO(2)(g) at 300 K is spo...

    Text Solution

    |

  6. When 1-pentyne (A) is treated with 4N alcoholic KOH at 175^(@)C, it is...

    Text Solution

    |

  7. One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 ...

    Text Solution

    |

  8. Two moles of a perfect gas undergo the following processes: a. A rev...

    Text Solution

    |

  9. The molar heat capacity , C(v) of helium gas is 3//2R and is independe...

    Text Solution

    |

  10. The enthalpy of vaporisation of a liquid is 30 kJ mol^(-1) and entropy...

    Text Solution

    |

  11. An insulated vessel contains 1mole of a liquid, molar volume 100mL at ...

    Text Solution

    |

  12. When 1mol of a monoatomic ideal gas at TK undergoes adiabatic change u...

    Text Solution

    |

  13. A monatomic ideal gas undergoes a process in which the ratio of P to V...

    Text Solution

    |

  14. The direct conversion of A to B is difficult hence it is carried out b...

    Text Solution

    |

  15. N(2)+3H(2) hArr 2NH(3) Which of the following statements is correct ...

    Text Solution

    |

  16. The value of log(10)K for a reaction A hArr B is (Given: Delta(f)H(298...

    Text Solution

    |

  17. For the process H(2)O(l) (1 "bar", 373 K) rarr H(2)O(g) (1"bar", 373 K...

    Text Solution

    |

  18. Assertion (A): For every chemical reaction at equilibrium, standard Gi...

    Text Solution

    |

  19. Assertion (A) : There is a natural asymmetry between converting work t...

    Text Solution

    |

  20. Among the following the state function(s) is (are):

    Text Solution

    |