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)`
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.

A

0

B

`6 JK^(-1)mol^(-1)`

C

`8 JK^(-1)mol^(-1)`

D

`12 JK^(-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) 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 ?

For change in entropy, units are

The value of Delta H - Delta U for the following reaction at 27^(@)C will be : N_(2(g)) + 3H_(2(g)) rarr 2NH_(3(g))

One of the following reactions involves in decrease of entropy

The entropy change in adiabatic process is

The entropy value at temperature T is

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

    |