Home
Class 11
CHEMISTRY
The process 1/2H2(g)+e rarrH(g) is endot...

The process `1/2H_2(g)+e rarrH(g)` is endothermic with `delta H=+151 KJ/mol.yet salt like hydrides are known.How do you account for this?

Text Solution

Verified by Experts

Syngas:The mixture of carbonmonoxide and hydrogn `(CO+H_2)`is called syngas.
Use: it si used in synthesis of methanol.
Promotional Banner

Topper's Solved these Questions

  • HYDROCARBONS

    PATHFINDER|Exercise QUESTION BANK|338 Videos

  • MOLE AND STOICHIOMETRY-I

    PATHFINDER|Exercise QUESTION BANK|234 Videos

Similar Questions

Explore conceptually related problems

for the reaction 2Cl(g)rarr Cl_2(g) What are the signs of Delta H and Delta S ?

Calculate the entropy change, at 0^@C for the process H_2O(s) rarr H_2O(I) . Given : At 0^@C , H_2O(s) rarr H_2O(g) , Delta H=51885 J. mol^-1 and H_2O(I) rarr H_2O(g) , Delta H=45860 J. mol^-1 .

N_2(g)+3H_2(g)rarr 2NH_3(g) Delta H_r^@=-92.4 KJ What is the standard enthalpy of formation of NH_3 ?

For the process H_(2)O(l)hArrH_(2)O(g),DeltaH=40.8kJ*mol^(-1) at the boiling poinit of water. Calculate molar entropy change for vaporisation from liquid phase.

Cl_2(g)rarr 2Cl(g) Delta H^@=242KJ mol^(-1) what is its enthalpy of atomization?

The enthalpies of formation of C_2H_2(g) and C_6H_6(g) at 298 K are 230 and 85 kJ/mol respectively. The enthalpy change for the reaction 3C_2H_2(g) to C_6H_6(g) is

At 1 atm and 298K DeltaH^(0) value of the reaction 2H_(2)(g)+O_(2)(g)to2H_(2)O(l) is -572 kJ. Calculate the change in entropy of the system and surroundings for this reaction. Is this reaction spontaneous at that temperature and pressure? Given: Standard molar entropies of H_(2)(g),O_(2)(g)&H_(2)O(l) at 298K are 130.6, 205.0 and 69.90 J*K^(-1)*mol^(-1) respectively.

Diborane [B_(2)H_(6)(g)] is used as a very effective fuel for rockets. Calculate the heat of combustion of diborane for the following reaction: B_(2)H_(6)(g)+3O_(2)(g)toB_(2)O_(3)(g)+3H_(2)O(g) Given: (1) 2B(s)+(3)/(2)O_(2)(g)toB_(2)O_(3) (s),DeltaH^(0)=-1273kJ*mol^(-1) (2) H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaH^(0)=-285.8kJ*mol^(-1) . (3) H_(2)O(l)toH_(2)O(g),DeltaH^(0)=+44kJ*mol^(-1) (4) 2B(s)+3H_(2)(g) to B_(2)H_(6)(g),DeltaH^(0)=+36kJ*mol^(-1) .

A 1 mol sample of N_(2)(g) reacts with 1 mol of O_(2)(g) to form 2 mol of NO(g),, where the increase in enthalpy is 180.6 kJ. Draw an enthalpy diagramm for this reaction.

PATHFINDER-HYDROGEN-QUESTION BANK
  1. How does H2O2 help in restoration of old lead paintings?

    Text Solution

    |

  2. Ionic hydrides are frequently used to remove traces of water from orga...

    Text Solution

    |

  3. The process 1/2H2(g)+e rarrH(g) is endothermic with delta H=+151 KJ/mo...

    Text Solution

    |

  4. What is the diffrence between hydrolysis and hydration?

    Text Solution

    |

  5. Explain how calgon is used to remove permanent hardness.

    Text Solution

    |

  6. Complete the following equtions. Mg^(+2) (aq)+Na2[Na4(PO3)6] rarr

    Text Solution

    |

  7. Complete the following equtions. + H2O2 rarr CaCl2+H2O+O2

    Text Solution

    |

  8. Complete the following equtions. Na3 As+D2O rarr

    Text Solution

    |

  9. Complete the following given equation: Ca3P2+H2O rarr

    Text Solution

    |

  10. Complete the following given equation: SiCl4+H2O rarr

    Text Solution

    |

  11. Complete the following given equation: AsO3^-3+H2O2 rarr

    Text Solution

    |

  12. Hydrogen forms compounds by 3 different process describe each of the p...

    Text Solution

    |

  13. The degree of hardness of a given sample of hrad water is 40 ppm if th...

    Text Solution

    |

  14. Calculate the strength of 10 volume solution of hydrogen peroxide.

    Text Solution

    |

  15. Can phosphorus with outer electronic configuration 3s^2 3p^3 form PH5?

    Text Solution

    |

  16. What is "water gas shift"? How is CO2 removed from the mixture?

    Text Solution

    |

  17. 5 ml solution of H2O2 liberates 0.508 g iodine from an acidifoed KI so...

    Text Solution

    |

  18. Give one chemical reaction in each case to show hydrolytic behaviour ...

    Text Solution

    |

  19. Give one chemical reaction in each case to show reducing nature of wa...

    Text Solution

    |

  20. Give one chemical reaction in each case to show oxidising behaviour ...

    Text Solution

    |