Home
Class 12
CHEMISTRY
As per second law of thermodynamics a pr...

As per second law of thermodynamics a process taken place spontaneously if and only if the entropy of the universe increases due to the process. Change in entropy is given by
`Delta S = (Q_(rev))/(T)`
A gas `C_(V) = (0.2 T) Cal K^(-1)`. What is the change in its entropy when one mole of it is heated from `27^(@)C` to `127^(@)C` at constant volume ?

A

`20calK^(-1) mol^(-1)`

B

`15calK^(-1) mol^(-1)`

C

`35calK^(-1) mol^(-1)`

D

`25calK^(-1) mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise Lecture Sheet -Exercise-IV|16 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise Practice Sheet-Exercise-I|33 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise Lecture Sheet- Exercise-II|25 Videos

  • CHEMICAL KINETICS

    AAKASH SERIES|Exercise Objective Exercise - 4 (Assertion (A) & Reason (R) Type Questions)|44 Videos

  • CHEMISTRY IN EVERY DAY LIFE

    AAKASH SERIES|Exercise PRACTICE EXERCISE|29 Videos

Similar Questions

Explore conceptually related problems

As per second law of thermodynamics a process taken place spontaneously if and only if the entropy of the universe increases due to the process. Change in entropy is given by Delta S = (Q_(rev))/(T) What is the change in entropy of the universe due to the following reaction occuring at 27^(@)C ? A + 2B rarr C + 2D, Delta H = +1.8 kJ mol^(-1) Molar entropy values of A, B, C and D are 1,2,3 and 4 JK^(-1) mol^(-1) respectively.

When one mole of an ideal gas is compressed to half of its initial volume and simultaneously heated to twice its initial temperature, the change in entropy of gas (Delta S) is

When 3.0 mole of an ideal diatomic gas is heated and compressed simultaneously from 300K, 1.0 atm to 400K and 5.0atm, the change in entropy is (Use C_(P) = (7)/(2)R for the gas)

The thermodynamic property that measures the extent of molecular disorder is called entropy. The direction of a spontaneous process for which the energy is constant is always the one that increases the molecular disorder. Entropy change of phase transformation can be calculated using Trouton's formula (DeltaS= (DeltaH)/(T)) . In the reversible adiabatic process, however, DeltaS will be zero. The rise in temperature in isobaric and isochoric conditions is found to increase the randomness or entropy of the system. DeltaS= 2.303 C log (T_(1)//T_(2)), (C = C_(P) or C_(V)) The melting point of a solid is 300K and its latent heat of fusion is 600 cal mol^(-1) . The entropy change for the fusion of 1 mole of the soli (in cal K^(-1) ) at the same temperature would be:

In an irreversible process taking place at constant T and P and in which only pressure- volume work is being done, the change on Gibb's free energy (dG) and changing in entropy (dS), stisfy the criteria

One mole of an ideal gas for which C_(V)= 3//2R heated at a constant pressure of 1 atm from 25^(0)C "to" 100^(0)C What will be the amount of heat change at constant pressure?

AAKASH SERIES-CHEMICAL THERMODYNAMICS-Lecture Sheet Exercise-III
  1. A reaction has both DH and DS negative. The rate of reaction

    Text Solution

    |

  2. What are the sign of the entropy change (+ or -) in the following: I...

    Text Solution

    |

  3. At 0^(@)C ice and water are in equilibrium and Delta H= 6.0KJ " then "...

    Text Solution

    |

  4. Melting & boiling point of NaCl respectively are 1080 K & 1600K. Delta...

    Text Solution

    |

  5. DeltaS("says") "for" 4Fe((s)) + 3O(2) rarr 2Fe(2) O(3(s)) " is" -550 J...

    Text Solution

    |

  6. False statement regarding second law of thermodynamics is

    Text Solution

    |

  7. In an irreversible process taking place at constant T and P and in whi...

    Text Solution

    |

  8. Necessary conditions for spontanity of a reaction

    Text Solution

    |

  9. Which statements are correct for a process involving an ideal gas?

    Text Solution

    |

  10. Combustion of sucrose is used by aerobic organisms for providing energ...

    Text Solution

    |

  11. Consider the following reaction : CO((g)) + 2H(2(g)) hArr CH(3)OH((g...

    Text Solution

    |

  12. Consider the following reaction : CO((g)) + 2H(2(g)) hArr CH(3)OH((g...

    Text Solution

    |

  13. Consider the following reaction : CO((g)) + 2H(2(g)) hArr CH(3)OH((g...

    Text Solution

    |

  14. As per second law of thermodynamics a process taken place spontaneousl...

    Text Solution

    |

  15. As per second law of thermodynamics a process taken place spontaneousl...

    Text Solution

    |

  16. Match the following columns

    Text Solution

    |

  17. Match the following columns

    Text Solution

    |

  18. Calculate equilibrium constant (in multiples of 10^(-80)) when sodium ...

    Text Solution

    |

  19. For a liquid, enthalpy of fusion is 1.435 xx 10^(3) cal mol^(-1) and m...

    Text Solution

    |

  20. Calculate the free energy change in kJ when 1 mole of NaCl is dissolve...

    Text Solution

    |