Home
Class 12
CHEMISTRY
2.1g of Fe combines with S evolving 3.7...

`2.1g` of `Fe ` combines with `S` evolving `3.77KJ` . The heat of formation of `FeS` in `KJ//mol` is

A

`- 1.79`

B

`- 100.5`

C

`- 3.77`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH//"mole of FeS"=(3.77xx56)/(2.1)=100.5`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise ORDINARY THINKING (Objective Questions) Bond energy|15 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise ORDINARY THINKING (Objective Questions) Free energy and Work function|57 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise ORDINARY THINKING (Objective Questions) First law of thermodynamics and Hess law|100 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS |Exercise JEE Section (Matrix Match type questions)|3 Videos

Similar Questions

Explore conceptually related problems

2.1g of Fe combines with S evoling 3.77KJ . The heat oof formation of FeS in KJ//mol is

For the reaction 3N_(2)O_((g))+2NH_(3(g)) rarr 4N_(2(g))+3H_(2)O_((g))Delta H^(@) = -879.6 KJ if standard heat of formation of ammonia and water are -45.9KJ/mol and -241.8KJ/mol. Then standard heat of formation of nitrous oxide in KJ/mol is

The heat of combustion of carbon and monoxide are -394 and -285 KJ mol^(-1) respectively. The heat of formation of CO in KJ mol^(-1) is :-

The heats of formation of CO_(2(g)) and H_(2)O_((l)) are - 398 and -285 kJ mol^(-1) respectively. The heat of combustton of methane is -390 kJ. The heat of formation of methane will be

The heat of combustion of graphite and carbon monoxide respectively are 393.5 kJ mol^(-1) and 283 kJ mol^(-1) . Thus, heat of formation of carbon monoxide in kJ mol^(-1) is

Using the following thermochemical equations : S("rhombic") + 3/2 O_(2)(g) rarr SO_(3)(g), " "Delta H = - 2x kJ mol^(-1) II. SO_(2)(g) + 1/2 O_(2)(g) rarr SO_(3)(g), " "Delta H = -Y kJ mol^(-1) Find out the heat of formation of SO_(2)(g) in kJ mol^(-1) .

When 14 grams of ethene is completely burnt in oxygen, the heat evolved is 705 kJ. What is the heat of combustion (in kJ mol^(-1) ) of ethene ?

ERRORLESS -THERMODYNAMICS AND THERMOCHEMISTRY -ORDINARY THINKING (Objective Questions) Heat of reaction
  1. Calculate DeltaH^(@) for the reaction Na(2)O(g)+SO(3)(g)toNa(2)SO(4)...

    Text Solution

    |

  2. When a strong acid, strong base or their salt are dissolved in water, ...

    Text Solution

    |

  3. 2.1g of Fe combines with S evolving 3.77KJ . The heat of formation of...

    Text Solution

    |

  4. Which compound will absorb the maximum amount of heat when dissolved i...

    Text Solution

    |

  5. In the reaction C+2SrarrCS(2)+DeltaH, DeltaH is the

    Text Solution

    |

  6. The following thermochemical reactions are given : M+(1)/(2)O(2)to M...

    Text Solution

    |

  7. A cylinder of gas is assumed to contain 11.2 kg of butane (C(4)H(10))....

    Text Solution

    |

  8. Thermodynamically the most stable form of carbon is

    Text Solution

    |

  9. Which of the following is an example of endothermic reaction

    Text Solution

    |

  10. The mutual heat of neutralisation of 40 g NaOH and 60CH(3)COOH will be

    Text Solution

    |

  11. The heats evolved in combustion of rhombic and monoclinic sulphur are,...

    Text Solution

    |

  12. The formation of water from H(2)(g) and O(2)(g) is an exothermic proce...

    Text Solution

    |

  13. Which of the following reaction can be used to define the heat of form...

    Text Solution

    |

  14. The molar neutralization heat for KOH and HNO(3) as compared to molar ...

    Text Solution

    |

  15. In Kirchoff's equation which factor affects the heat of reaction :

    Text Solution

    |

  16. An exothermic reaction is one which

    Text Solution

    |

  17. Which of the following fuels will have the highest calorific value (kJ...

    Text Solution

    |

  18. If H^(+)+OH^(-)rarrH(2)O+13.7Kcal , the heat of neutralisation for com...

    Text Solution

    |

  19. The lowest value of heat of neutralization is obtained for

    Text Solution

    |

  20. All reaction with chemical dissociation are

    Text Solution

    |