Home
Class 12
CHEMISTRY
The standard heat of formation in kcal/...

The standard heat of formation in kcal/mol of `NO_(2(g)) and N_2O_(4(g))` are 8.0 and 2.0 respectively . The heat of dimerisation of `NO_2` is

A

A) `-14.0` kcal

B

B)`-6.0` kcal

C

C) `+12.0` kcal

D

D) `10.0` kcal

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MODEL TEST PAPER 02

    KCET PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

  • MODEL TEST PAPER 3

    KCET PREVIOUS YEAR PAPERS|Exercise (CHEMISTRY)|60 Videos

Similar Questions

Explore conceptually related problems

The standard enthalpies of formation of HCl(g), H(g) and Cl(g) are -92.2 , 217.7 and 121.4 kJ mol^(-1) respectively. The bond dissociation enthalpy of HCl is :

The standard Gibbs free energies (Delta_(f) G^(@)) for the formation of SO_(2)(g) and SO_(3)(g) are -300.0 and -371.0 kJ mol^(-1) at 300 K respectively. Delta G for the reaction. 2SO_(2)(g) + O_(2)(g) hArr 2SO_(3)(g) is

For the equilibrium 2SO_(3(g))hArrSO_(2(g))+O_(2(g)) , the value of equilibrium constant is 4.8xx10^(-3) at 700^(@)C . At equilibrium, if the concentration of SO_(3) and SO_(2) are 0.60M and 0.15M respectively. Calculate the concentration of O_(2) in the equillibrium mixture.

The standard entropy change for the reaction C_3H_(6(g)) + 9/2O_(2(g)) to 3CO_(2(g)) + 3H_2O_((l)) is – 339.23 JK-1 at 25^@C . Calculate the standard reaction enthalpy change if the standard Gibbs energy of formation of C_3H_(6(g)), CO_(2(g)) and H_2O_((l)) are 62.78, – 394.36 and –237.13 kJ. "mol"^(–1) respectively.

The heats of atomisation of PH_(3)(g) and P_(2)H_(4)(g) are 954 kJ mol^(-1) and 1485 kJ mol^(-1) respectively. The P-P bond energy in kJ mol^(-1) is

Predict whether the reaction CO_((g)) + H_2O_((g)) to CO_(2(g)) + H_(2(g)) is spontaneous or not. The standard free energies of formation of CO_((g)), H_2O_((g)) and CO_(2(g)) are – 137.27, –228.6 and –394.38 kJ mole"^(-1) respectivley.

KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER 10-CHEMISTRY
  1. Transition of electron from n=3 to n=1 level results in

    Text Solution

    |

  2. 10 g of hydrochloric acid gas occupies 5.6 litre of volume at STP . Th...

    Text Solution

    |

  3. The standard heat of formation in kcal/mol of NO(2(g)) and N2O(4(g)) ...

    Text Solution

    |

  4. Heat of neutralization of HF is

    Text Solution

    |

  5. The pH of a solution having [H^(+)]=10xx10^(-4) mol/litre will be

    Text Solution

    |

  6. For the reaction : 2 NH(3)(g) rarr N(2)(g) + 3 H(2)(g)

    Text Solution

    |

  7. The most favourable condition of temperature and pressure for the oxid...

    Text Solution

    |

  8. 1% (wt./vol) solution of urea is isotonic with 3% (wt./vol.) solution ...

    Text Solution

    |

  9. The substance whose solubility decreases with increase in temperature

    Text Solution

    |

  10. 1 ml of hydrogen gas at NTP contains molecules equal to

    Text Solution

    |

  11. 13.5 g of Al get deposited when electricity is passed through soluti...

    Text Solution

    |

  12. When iron or zinc added to CuSO(4) solution copper is precipitated, it...

    Text Solution

    |

  13. The amount of KMnO4 required to prepare 100 ml of 0.1 N solution in al...

    Text Solution

    |

  14. An atom having ns^(1) configuration may belong to

    Text Solution

    |

  15. Which particle is used to bombard ""(13)^(28)Al to give ""(15)^(31)P ...

    Text Solution

    |

  16. An oxide of N has vapour density 46. Total number of electron in 92 g ...

    Text Solution

    |

  17. A given gas cannot be liquefied if its temperature is

    Text Solution

    |

  18. At STP , the order of root mean square velocity of molecules H2,N2,O2...

    Text Solution

    |

  19. Which represents and amide ?

    Text Solution

    |

  20. An amine reacts with C6H5SO2Cl and the product is soluble in alkali a...

    Text Solution

    |