Home
Class 11
CHEMISTRY
If (1)/(2)X(2)O((s)) rarr X((s))+(1)/(4)...

If `(1)/(2)X_(2)O_((s)) rarr X_((s))+(1)/(4)O_(2(g)),DeltaH=90kJ` then heat change during reaction of metal `X` with `1 mol e O_(2)` to form oxide to maximum extent is `:`

A

`-360 kJ`

B

`-180 kJ`

C

`+360 kJ`

D

`+180 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`1/4` mole of `O_(2) rarr 90 kJ`
1 mole `rarr` ?
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NARAYNA|Exercise Level-IV|27 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Level -I (H.W)|38 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Level -II (C.W)|41 Videos

  • STRUCTURE OF ATOM

    NARAYNA|Exercise EXERCISE - IV EXEMPLAR PROBLEMS|24 Videos

Similar Questions

Explore conceptually related problems

If C(s)+O_(2)(g)rarrCO_(2)(g),DeltaH=X and CO(g)+1//2O_(2)(g)rarrCO_(2)(g),DeltaH=Y , then the heat of formation of CO is

H_(2)O(s) rarr H_(2)O(l), DeltaH = 6.01 kJ DeltaH is the heat of …………………of ice.

H_(2)O(l) rarr H_(2)O(s), DeltaH =- 6.01 kJ DeltaH is the heat of ……………….of water.

The thermochemical equation for solid and liquid rocket fuel are given below: 2AI(s) +1(1)/(2)O_(2)(g) rarr AI_(2)O_(3)(s), DeltaH =- 1667.8 kJ H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.9 kJ a. If equal masses of aluminium and hydrogen are used, which is a better rocket fuel? b. Determine DeltaH for the reaction AI_(2)O_(3)(s) rarr 2AI(s)+1(1)/(2)O_(2)(g)

The enthalpy changes for two reactions are given by the equations: 2Cr(s) +(3)/(2)O_(2)(g) rarr Cr_(2)O_(3)(s), DeltaH^(Theta) =- 1130 kJ C(s) +(1)/(2)O_(2)(g)rarr CO_(2)(g), DeltaH^(Theta) =- 110 kJ What is the enthalpy change in kJ for the following reactions? 3C(s) +Cr_(2)O_(3)(s) rarr 2Cr(s) +3CO(g)

If 2AI(s) +1(1)/(2) O_(2)(g) rarr AI_(2)O_(3)(s), DeltaH =- 1667.8 kJ H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.9 kJ Calculate DeltaH for the reaction AI_(2)O_(3)(s) rarr 2AI(s) +1(1)/(2)O_(2)(g)

The equations representing the combustion of carbon and carbon monoxide are : C(s) + O_(2)(g) to CO_(2)(g) DeltaH = -394 (kJ)/(mol) CO(s) + 1/2 O_(2)(g) to CO_(2)(g) DeltaH = -284.5 (kJ)/(mol) the heat of formation of 1 mol of CO(g) is :

NARAYNA-THERMODYNAMICS-Level -III
  1. The lattice energy of solid NACl is 180K. Cal mol^(-1). The dissolutio...

    Text Solution

    |

  2. The change in enthalpy when HF reacts with NaOH in dilute conditions i...

    Text Solution

    |

  3. If (1)/(2)X(2)O((s)) rarr X((s))+(1)/(4)O(2(g)),DeltaH=90kJ then heat ...

    Text Solution

    |

  4. The bond energy of H(2) is 104.3 k.cal mol^(-1). It means that

    Text Solution

    |

  5. Calculate the heat of combustion (in KJ) of methane from the following...

    Text Solution

    |

  6. For which of these process is the value of DeltaH negative (i) N(2)+...

    Text Solution

    |

  7. 2H(2(g))+2Cl(2(g))rarr 4HCl(g), DeltaH^(@)=-92.3 kJ (i) If the equat...

    Text Solution

    |

  8. The correct statement among the following (i) heat of reaction depen...

    Text Solution

    |

  9. The data given below are for vapour phase reactions at constant pressu...

    Text Solution

    |

  10. The enthalpy of neutralisation of a weak acid in 1 M solution with a s...

    Text Solution

    |

  11. One mole of a non-ideal gas undergoes a change of state (2.0atm,3.0L,9...

    Text Solution

    |

  12. The enthalpy of combustion of H(2(g)) to give H(2)O((g)) is -249 kJ mo...

    Text Solution

    |

  13. If a 298K the bond energies of C-H,C-C,C=C and H-H bonds are respectiv...

    Text Solution

    |

  14. The formation of the oxide ion O((g))^(2-) requires first an exothermi...

    Text Solution

    |

  15. An ideal gas is allowed to expand both reversible and irreversibly in ...

    Text Solution

    |

  16. The enthalpy changes for the following process are listed below : Cl...

    Text Solution

    |

  17. Assuming that water vapour is an ideal gas, the internal energy change...

    Text Solution

    |

  18. Oxidising power of chlorine in aqueous solution can be determined by t...

    Text Solution

    |

  19. The standard enthalpy of formation of NH(3) is -46.0KJ mol^(-1) . If t...

    Text Solution

    |

  20. In conversion of lime-stone to lime, CaCO(3(s)) to CaO((s)) + CO(2(g...

    Text Solution

    |