Home
Class 12
CHEMISTRY
The hypothetical gaseous reaction A+B ...

The hypothetical gaseous reaction
`A+B to AB`

A

should be exothermic

B

should be endothermic

C

does not involve enthalpy change

D

cannot be predicted.

Text Solution

Verified by Experts

The correct Answer is:
A
As the reaction proceeds in forward direction
`:. DeltaS=-ve` because two moles changes to one. Hence, it is possible only if `DeltaH=-ve`.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Additional Numerical Problems For Practice|16 Videos

  • CHEMISTRY IN EVERY DAY LIFE

    DINESH PUBLICATION|Exercise Unit test-9|50 Videos

Similar Questions

Explore conceptually related problems

Consider the hypothetical reaction : A + 2B rarr C The rate remains constant when the concentration of A is doubled and the concentration of B is held concentration of B is doubled and the concentration of A is held constant. What are the orders of A and B in this reaction?

The rate of a gaseous reaction is equal to k[A][B]. The volume of the reaction vessel containing these gases is reduced by one fourth of the initial volume. The rate of the reaction would be

For the hypothetical equilibrium reactions , AhArr B, K_1=2.0,BhArrC,K_2=0.010 .What is the value of K for the reaction , 2C to 2A ?

A hypothetical reaction A_(2) + B_(2) rarr 2AB follows the mechanism as given below: A_(2) hArr A+A ("fast") A+B_(2) rarr AB+B (slow) A+B rarr AB (fast) The order of the overall reaction is

For hypothetical reaction A(g) + B(g) to C(g) + D(g) Which of the following statements is correct ?

DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. Which of the following expression defines the physical significance of...

    Text Solution

    |

  2. A gas is allowed to expand reversibly under adiabatic conditions. What...

    Text Solution

    |

  3. The hypothetical gaseous reaction A+B to AB

    Text Solution

    |

  4. For a process H(2)O(s) rarr H(2)O(l) at 273 K

    Text Solution

    |

  5. For the process "Dry ice" to CO(2)(g)

    Text Solution

    |

  6. The non- expansion work of a system

    Text Solution

    |

  7. For the percipitation reaction of Ag^(o+) ions with NaCI, which of the...

    Text Solution

    |

  8. Heat of neutralisation of NaOH and HCl is -57.46 kJ // equivalent. The...

    Text Solution

    |

  9. The enthalpy change for a given reaction at 298 K is -x cal mol^(-1). ...

    Text Solution

    |

  10. One litre-atmosphere is approximately equal to

    Text Solution

    |

  11. The heat change at constant volume for the decomposition of silver (I)...

    Text Solution

    |

  12. The maximum efficiency of a steam engine operating between 110^(@)C an...

    Text Solution

    |

  13. What per cent T(1) is of T(2) for a heat engine whose efficiency is 10...

    Text Solution

    |

  14. An engine operating between 100^(@)C and 0^(@)C takes 453.6 kcal of he...

    Text Solution

    |

  15. Theheat capacity of liquid water at constant pressure, C(P) is 18 cal ...

    Text Solution

    |

  16. A gas is allowed to expand at constant temperature from a volume of 1....

    Text Solution

    |

  17. For the reaction between CO(2) and graphite: CO(2)(g)+C(s)to2CO(g), ...

    Text Solution

    |

  18. A system has internal energy equal to U(1), 450J of heat is taken out ...

    Text Solution

    |

  19. Entropy of vaporisation of water at 100^(@)C, if molar heat of vaporis...

    Text Solution

    |

  20. For decomposition of Ag(2)O into 2 mol of Ag(s) and 1//2 mol of O(2)(g...

    Text Solution

    |