Home
Class 12
CHEMISTRY
Standard enthalpy of formation is zero f...

Standard enthalpy of formation is zero for

A

`C_("diamond")`

B

`Br_((g))`

C

`C_("graphite")`

D

`O_(3(g))`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -4|18 Videos
  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -2|100 Videos
  • TEST PAPERS

    ALLEN|Exercise MATHEMATICS|2 Videos
  • Thermodynamics And Thermo Chemistry

    ALLEN|Exercise All Questions|40 Videos

Similar Questions

Explore conceptually related problems

Standard enthalpy of formation is non zero for

Define the following terms: (a) Standard enthalpy of formation (b) Bond enthalpy ( c) Zeroth law of thermodynamics (d) Reversible and irrversible process

One mole of ethanol is produced reacting graphite , H_2 and O_2 together . The standard enthalpy of formation is -277.7 " kJ mol"^(-1) Calculate the standard enthalpy of the reaction when 4 moles of graphite is involved.

H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(l) , Delta H at 298 K = - 285.8 kJ The molar enthalpy of vapourization of water at 1 atm and 25^(@)C is 44 kJ. The standard enthalpy of formation of 1 mole of water vapour at is

Choose the reaction, for which the standard enthalpy of reaction is equal to the standard enthalpy of formation:

Which among the following represents standard enthalpy of formation?

Standard molar enthalpy of formation of CO_(2) is equal to :

The standard enthalpy of formation of hypothetical MgCl is -125kJ mol^(-1) and for MgCl_(2) is -642 kJ mol^(-1) . What is the enthalpy of the disproportionation of MgCl ?

The standard enthalpy of formation of NH3 is -46.0 kJ mol^(-1) . If the enthalpy of formation of H_2 from its atoms is -436 kJ mol and that of N_2 is -712 kJ mol, the average bond enthalpy of N - H bond in NH_3 is

The standard enthalpy of formation of octane (C_(8)H_(18)) is -250kJ //mol . Calculate the enthalpy of combustion of C_(8)H_(18) . The enthalpy of formation of CO_(2)(g) and H_(2)O(l) are -394 kJ//mol and -286kJ//mol respectively.

ALLEN-THERMODYNAMICS -EXERCISE -3
  1. The standard heat of formation of CS(2)(I) will be, given that the sta...

    Text Solution

    |

  2. The heat of combustion of CH(4(g)), C((g)) and H(2(g)) at 25^(@)C are ...

    Text Solution

    |

  3. Standard enthalpy of formation is zero for

    Text Solution

    |

  4. The standard heat for formation of NO(2) and N(2)O(4) are 8.0 and 2.0...

    Text Solution

    |

  5. M is a metal that forms an oxide M(2)O,(1)/(2)M(2)O rarr M+(1)/(4)O(2)...

    Text Solution

    |

  6. According to equation, C(6)H(6)(l)+15//2 O(2)(g)rarr 6CO(2)(g)+3H(2)O(...

    Text Solution

    |

  7. Heat of combustion of CH(4), C(2)H(6), C(2)H(4) and C(2)H(2) gases are...

    Text Solution

    |

  8. The standard enthalpy of formation of CO is -110 kJ and of CO2 is -394...

    Text Solution

    |

  9. If enthalpies of formation of C(2)H(4)(g),CO(2)(g) and H(2)O(l) at 25^...

    Text Solution

    |

  10. The heat of combustion of carbon and monoxide are -394 and -285 KJ mol...

    Text Solution

    |

  11. When a certain amount of ethylene was combusted, 6226 kJ heat was evol...

    Text Solution

    |

  12. Find out the heat evolved in combustion if 112 litre (at 1 atm, 273 K)...

    Text Solution

    |

  13. A person requires 2870 kcal of energy to lead normal daily life. If he...

    Text Solution

    |

  14. On complete combustion of 2 gm methane 26575 cals of heat is generated...

    Text Solution

    |

  15. X gm of ethanal was subjected to combustion in a bomb calorimeter and ...

    Text Solution

    |

  16. The following are heats of reactions : (A) DeltaH(f)^(@) of H(2)O(l)...

    Text Solution

    |

  17. The enthalpy combustion of a substance

    Text Solution

    |

  18. The value of Delta H for the combustion of C(s) is - 94.4 Kcal. The he...

    Text Solution

    |

  19. In the combustion of 0.4 g. of CH(4) 0.25 Kcal. Of heat is liberated. ...

    Text Solution

    |

  20. If C(6)H(12)O(6)(s) +6O(2)(g) to 6CO(2)(g)+6H(2)O (l), triangleH=680 K...

    Text Solution

    |