Home
Class 12
CHEMISTRY
Free energies of formation (Deltaf G) of...

Free energies of formation `(Delta_f G)` of MgO (s) and CO(g) at 1273 K and 2273 K are given below `(Delta_f G) [MgO (s)] = - 941 kJ//mol at 1273 K `(Delta_f G) [MgO (s)] = -314kJ//mol at 2273K `(Delta_f G) [CO (g)] = -439 kJ//mol at 1273 K `(Delta_f G) [CO (g)] = - 628 kJ //mol at 2273 K On the basis of above data, predict the temperature at which carbon can be used as a reducing agent for MgO (s) .

Promotional Banner

Topper's Solved these Questions

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    MODERN PUBLICATION|Exercise EXERCISE|303 Videos

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise EXERCISE|529 Videos

  • HALOALKANES AND HALOARENES

    MODERN PUBLICATION|Exercise EXERCISE|978 Videos

Similar Questions

Explore conceptually related problems

What is the melting point of benzene if DeltaH_("fusion")= 9.95kJ//mol and DeltaS_("fusion")= 35.7J//K-"mol"

Determine the enthalpy of formation of B_(2)H_(6) (g) in kJ/mol of the following reaction : B_(2)H_(6)(g)+3O_(2)(g)rarrB_(2)O_(3)(s)+3H_(2)O(g) , Given : Delta_(r )H^(@)=-1941 " kJ"//"mol", " "DeltaH_(f)^(@)(B_(2)O_(3),s)=-1273" kJ"//"mol," DeltaH_(f)^(@)(H_(2)O,g)=-241.8 " kJ"//"mol"

Calculate the standard enthaply of formation of CH_(3) OH(l) from the following data CH_(3) OH (l) + (3)/(2) O_(2) (g) to CO_(2) (g) + 2H_(2)O (l) , Delta_(r) H^(@) = - 726 kj/mol C(g) + O_(2) (g) to CO_(2) (g), Delta_(c) H^(@) = - 393 kj/mol H_(2)(g) + (1)/(2) O_(2) (g) to H_(2) O(l) : Delta_(f) H^(@) = - 286 kj /mol

Determine K_(p) for the reaction : A(g) + B(s) hArr C(g) + D(g), K_(c) = 49 at 127^(@)C .

Calculate the cell potential (in V) if /_\ G=-96.5kJ/mol and n=1

The enthaply change (Delta H) for reaction, N_(2) (g) + 3H_(2)(g) to 2NH_(3) (g) is 92.38 kj at 298 K. What is Delta U at 298 K ?

Enthaples of formation of CO(g), CO_(2)(g), N_(2)O (g) and N_(2)O_(4) (g) are - 110, - 393, 81 and 9.7 kj mol^(-1) respectively. Find the value of Delta H for the reaction: N_(2)O_(4) (g) + 3CO(g) to N_(2) O(g) + 3 CO_(2) (g)

The standard free energy change of a reaction is DeltaG^(@)=-115kJ//mol^(-1) at 298 K. Calculate the value of log_(10)K_(p) (R=8.314JK^(-1)mol^(-1))

MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. Free energies of formation (Deltaf G) of MgO (s) and CO(g) at 1273 K a...

    Text Solution

    |

  2. True of False : Copper is found both in free as well as in combined st...

    Text Solution

    |

  3. True of False : All minerals are ores put all ores cannot be minerals.

    Text Solution

    |

  4. True of False : The minerals siderite, magnetite and haematite contain...

    Text Solution

    |

  5. True of False : Flux combines with slag to form gangue.

    Text Solution

    |

  6. True of False : In calcination, the ore is heated with calcium.

    Text Solution

    |

  7. True of False : Silver is extracted by by hydrometallurgy.

    Text Solution

    |

  8. Zone refining is used for the

    Text Solution

    |

  9. True of False : The metals Ag, Au and Hg are extracted by pyrometallur...

    Text Solution

    |

  10. Chromium steel is the mixture of-

    Text Solution

    |

  11. Which of the following reagents can be used to convert acetamide into ...

    Text Solution

    |

  12. Complete the missing links : The earthly and silicious impurities whic...

    Text Solution

    |

  13. The most abundant element in the earth's crust is:

    Text Solution

    |

  14. Purest form of iron is

    Text Solution

    |

  15. State whether the statement is true or false- Lunar caustic is the com...

    Text Solution

    |

  16. Zirconium is best refined by ......... method.

    Text Solution

    |

  17. In blast furnace, iron oxide is reduced by

    Text Solution

    |

  18. Nichrome metal alloy is a mixture of-

    Text Solution

    |

  19. The naturally occurring chemical substances in the form of which metal...

    Text Solution

    |

  20. Copper can be extracted from

    Text Solution

    |

  21. Fill in the blanks- alloy is made up of 14% of manganese and 85% of ir...

    Text Solution

    |