Home
Class 12
CHEMISTRY
Standard enthalpies of formation of O(3)...

Standard enthalpies of formation of `O_(3),CO_(3),NH_(3) and HI` are 142.2,-383.2,-46.2 and +25.9kJ `mol^(-1)` respectively. The order of their increasing stabilities will be:

A

`O_(3),CO_(2),NH_(3),HI`

B

`CO_(2),NH_(3),HI,O_(3)`

C

`O_(3),HI,NH_(3),CO_(2)`

D

`NH_(2),HI,CO_(2),O_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
(i) Exothermic compounds are more stable than endothermic compounds
(ii) Greater is the amount of heat evolved in the formation of a compound, more will be its stability.
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Objective Question Level B Set II|8 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Assertion Reason Type Question|29 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Set 2|18 Videos

  • CHEMICAL KINETICS

    OP TANDON|Exercise LINKED COMPRESHENSION TYPE QUESTIONS ( SECTION-VI)|4 Videos

  • CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    OP TANDON|Exercise INTEGER|2 Videos

Similar Questions

Explore conceptually related problems

Standard enthalpies of formation of O_3,CO_2,NH_3 and HI are 142.2 , - 393.2, -46.2 and +25.9 "kJmol"^(-1) respectively . The order of their increasing stabilities will be

In a fuel celll, methanol is used as a fuel and O_(2) is used as oxidizer. The standard enthalpy of combustion of methanol is -726 kJ mol^(-1) . The standard free energies of formation of CH_(3)OH(I), CO_(2)(g) and H_(2)O(I) are -166.3, -394.4 and -237.1 kJ mol^(-1) respectively. The standard free energy change of the reaction will be

The standard enthalpies of formation of CO_(2)(g) and HCOOH (l) are -393.7 kJ"mol"^(-1) and -409.2 kJ"mol"^(-1) respectively. Which of the following statements are correct?

Find the value of Delta_(f) H^(@) for the reaction N_(2) O_(4) (g) + 3 CO(g) rarr N_(2) O (g) + 3 CO_(2) (g) Standard enthalpies of formation of CO(g), CI_(2) (g), N_(2) O (g) , and N_(2) O_(4) (g) are - 110, - 393, 81 , and 9.7 kJ mol^(-1) , respectively. Strategy : The standard enthalpy change of a reaction is equal to the sum of the standard molar enthalpie of formation of the products each miltiplied by its stiochiometric coefficient in the balanced equation, minus the corresponding sum of the standard molar enthalpies of formation of the reactants

From the following data, calculate the enthalpy change for the combustion of cyclopropane at 298K . The enthalpy of formation of CO_(2(g)),H_(2)O_((l)) and Propen e_((g)) are -393,-285.8 and 20.42 kJ mol^(-1) respectively. The enthalpy of isomerisation of cyclopropane to propene is -33.0kJ mol^(-1)

The enthalpies of formation of CO and CO_(2) are -110.5 KJ mol^(-1) and -393.5 KJ mol^(-1) respectively. The enthalpy of combustion of carbon monoxide is

OP TANDON-Chemical Thermodynamics and Thermochemistry-Objective Question Level B
  1. Although the dissociation of ammonium chloride (CH(4)Cl) in water is a...

    Text Solution

    |

  2. The S-S bond energy is if DeltaH(f)^(@)(E(t)-S-E(t))=-147kJ//mol,Delta...

    Text Solution

    |

  3. Standard enthalpies of formation of O(3),CO(3),NH(3) and HI are 142.2,...

    Text Solution

    |

  4. Consider the following reaction. C(6)H(6)(l)+(15)/(2)O(2)(g)rarr6CO(...

    Text Solution

    |

  5. Which among the following represents the reaction of formation of the ...

    Text Solution

    |

  6. How much energy must be supplied to change 36 g of ice at 0^(@)C to wa...

    Text Solution

    |

  7. A large positive value of DeltaG^(ɵ) corresponds to which of these?

    Text Solution

    |

  8. Consider the values of DeltaH("in" kJ mol^(-)) and for DeltaS("in" mol...

    Text Solution

    |

  9. Fe(2)O(2)(s)+(3)/(2)C(s)to(3)/(2)CO(2)(g)+2Fe(s) DeltaH^(@)=+234.12K...

    Text Solution

    |

  10. Consider this equation and the associated value for DeltaH^(@). 2H(2...

    Text Solution

    |

  11. The internal energy (U) of an ideal gas decreases by the same amount a...

    Text Solution

    |

  12. The enthalpy of neutralisation of a strong acid by a string base is -5...

    Text Solution

    |

  13. For which process will DeltaH and DeltaG^(@) be expected to be most si...

    Text Solution

    |

  14. For a particular reaction, DeltaH=-38.3 kJ and DeltaS^(@)=-113JxxK^(-1...

    Text Solution

    |

  15. Which halogen in its standard state has the greatest absolute entropy ...

    Text Solution

    |

  16. For which of these processes is the value of Delta S negative? i. Su...

    Text Solution

    |

  17. When solid NH(4)NO(3) is dissolved in water at 25^(@)C, the temperatur...

    Text Solution

    |

  18. The diagram below shows the heat of reaction between N(2),O(2) NO and ...

    Text Solution

    |

  19. The enthalpy changes for two reactions are given by the equations: 2...

    Text Solution

    |

  20. The enthalpy changes at 298 K in successive breaking of O-H bonds of ...

    Text Solution

    |