Home
Class 12
CHEMISTRY
Change in enthalpy for reaction, 2H(2)O(...

Change in enthalpy for reaction, `2H_(2)O_(2)(l) to 2H_(2)O(l) + O_(2)(g)` if heat of formation of `H_(2)O_(2)(l) and H_(2)O(I)` are -188 and -286 KJ/mol respectively is

A

`-196 kJ//mol`

B

`+196 kJ//mol`

C

`+948 kJ//mol`

D

`-948 kJ//mol`

Text Solution

Verified by Experts

The correct Answer is:
1
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Change in enthalpy for reaction 2H_(2)O_(2)(l)rarr2H_(2)O(l)+O_(2)(g) if heat of formation of H_(2)O_(2)(l) and H_(2)O(l) are -188 and -286KJ//mol respectively is

For the process, H_(2)O(l) to H_(2)O(g)

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.

In the reaction 2H_(2)(g) + O_(2)(g) rarr 2H_(2)O (l), " "Delta H = - xkJ

Calculate the standard enthalpy change for the reaction CH_4 (g) + 2O_2(g) to CO_2(g) + 2H_2O(l) , given that the standard heatds of formation of CH_4(g, CO_2(g) and H_2O (l) are -74.91 mol^(-1), -394.12 kJ mol^(-1) and -286.31 kJ mol^(-1) respectivley.

what is entropy change for reaction 2H2(g) + O2 (g) -----?2H2O(l). Standard entropies of H2(g) , O2(g) and H2O(l) are 126.6, 201.20,68.0 J/k mol respectively

Calculate the standard enegry change for the reaction: OF_(2)(g) +H_(2)O(g) rarr O_(2)(g) +2HF(g) at 298K The standard enthalpies of formation of OF_(2)(g), H_(2)O(g) , and HF(g) are +20, -250 , and -270 kJ mol^(-1) , respectively.

The rate constant of the reaction 2H_(2)O_(2)(aq) rarr 2H_(2)O(l) + O_(2)(g) is 3 xx 10^(-3) min^(-1) At what concentration of H_(2)O_(2) , the rate of the reaction will be 2 xx 10^(-4) Ms^(-1) ?

Calculate the standard internal energy change for the following reactions at 25^(@)C : 2H_(2)O_(2)(l) rarr 2H_(2)O(l) +O_(2)(g) Delta_(f)H^(Theta) at 25^(@)C for H_(2)O_(2)(l) =- 188 kJ mol^(-1) H_(2)O(l) =- 286 kJ mol^(-1)

The heat of formation of H_(2)O(l) is -68.0 kcal, the heat of formation of H_(2)O(g) can logically be

ALLEN-Thermodynamics And Thermo Chemistry-All Questions
  1. The heat of combustion of ethanol determined in a bomb calorimeter is ...

    Text Solution

    |

  2. 4S(s)+602to4SO(3)(g),DeltaH f or this reaction is - 1583.2 kJ . The e...

    Text Solution

    |

  3. The heat change for the reaction C(s)+2S(s)toCS(2)(l) is called the...

    Text Solution

    |

  4. Based on the following thermochemical equations H(2)O(g)+C(s)rarrCO(...

    Text Solution

    |

  5. In the reversible reaction of the type A+B hArr AB, in general.

    Text Solution

    |

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

    Text Solution

    |

  7. Given that , C(s) + O(2)(g) to CO(2)(g), DeltaH^(@)=-xKJ 2CO(g) + ...

    Text Solution

    |

  8. Identify the correct statement regarding entropy

    Text Solution

    |

  9. Change in enthalpy for reaction, 2H(2)O(2)(l) to 2H(2)O(l) + O(2)(g) i...

    Text Solution

    |

  10. When 1 mole gas is heated at constant volume, temperature is raised fr...

    Text Solution

    |

  11. For which one of the following equations DeltaH(r)^(@) equal to DeltaH...

    Text Solution

    |

  12. Internal energy of an ideal gas depends upon a) Temperature only b) vo...

    Text Solution

    |

  13. The process in which no heat enters or leaves the system is termed as

    Text Solution

    |

  14. The work done during the expansion of a gas from 4dm^(3) to 6dm^(3) ag...

    Text Solution

    |

  15. Calculate the work done during isothermal reversible expansion expansi...

    Text Solution

    |

  16. (Delta H - Delta U) for the formation of carbon monoxide (CO) from its...

    Text Solution

    |

  17. Molar heat of vaporization of a liquid is 6 KJ mol^(-1). If its entrop...

    Text Solution

    |

  18. Heat of formation of CO(2)(g), H(2)O(l) and CH(4)(g) are -94.0, -68.4 ...

    Text Solution

    |

  19. Enthalpy of the system is given as

    Text Solution

    |

  20. In a chemical reaction, Delta H = 150 kJ and Delta S = 100 JK^(-1) at ...

    Text Solution

    |