Home
Class 11
CHEMISTRY
Calculate standard entropy change in the...

Calculate standard entropy change in the reaction
`Fe_(2)O_(3)(s)+3H_(2)(g) rarr 2Fe(s)+3H_(2)O(l)`
Given `: S_(m_(0))(Fe_(2)O_(3), s)=87.4,S_(m)^(@)(Fe,s)=27.3`
`S_(m)^(@)(H_(2),g)=130.7,S_(m)^(@)(H_(2)O,l)=69.9JK^(-1)mol^(-1)`

A

`-212.5 JK^(-1)mol^(-1)`

B

`-215.2JK^(-1)mol^(-1)`

C

`-120.9JK^(-1)mol^(-1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta_(r )S^(@)=Sigmav_(p)S^(@)("products")-Sigmav_(R)S^(@)("Reactants")`
`=(2xx27.3 +3xx69.9)-(87.4+3xx130.7)`
`=-215.2 " JK"^(-1)" mol"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 3 - One Or More Answers Are Correct|1 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 3 - Match The Column|2 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 2 (Q.1 To Q.30)|1 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|20 Videos

Similar Questions

Explore conceptually related problems

Complete the reaction: Fe(s)+dil H_2SO_4rarr

Justify tht the reaction 2Na(s) + H_(2)(g) rarr 2NaH(s) is a redox reaction.

In the reaction, SO_2(g) + 2H_2S (g) rarr 2H_2O (l) + S (s) the reducing agents is

Complete the chemical reaction : S_2O_3^(2-)+ Cr_2O_7^(2-)+ H^(+) rarr

The rection : Fe_2O_3 + 2Al rarr Al_2O_3 + 2Fe is an example of

Balance the following equations. (i) H_2S (g) + SO_2 (g) rarr S (s)+ H_2O (l)

Classify each of the following reactions 2KNO_3(s) rarr 2KNO_2(s)+O_2 (g)

Complete the reaction : I_2+ S_2O_3^(2-) rarr

Fill in the blanks In the reaction : Fe_2O_3 + 2Al rarr 2Fe + Al_2O_3, Fe_2O_3 is……………….. Agent.

Balance the following chemical equation: Pb(NO_3)_2(s) rarr 2PbO(s)+NO_2(g)+O_2(g)

NARENDRA AWASTHI-THERMODYNAMICS-Exercise
  1. When one mole of an ideal gas is compressed to half of its initial vol...

    Text Solution

    |

  2. What is the change in entropy when 2.5 mole of water is heated from 27...

    Text Solution

    |

  3. Calculate standard entropy change in the reaction Fe(2)O(3)(s)+3H(2)...

    Text Solution

    |

  4. Calculate the entropy change (J//mol K) of the given reaction. The mol...

    Text Solution

    |

  5. Given Delta(r)S^(@)=-266 and the listed [S(m)^(@)value] Calculate S^(...

    Text Solution

    |

  6. The entropy change for a phase transformation is :

    Text Solution

    |

  7. What is the melting point of benzene if DeltaH("fusion")= 9.95kJ//mol ...

    Text Solution

    |

  8. DeltaS for freezing of 10 g of H(2)O(l) (enthalpy of fusion is 80 cal/...

    Text Solution

    |

  9. Chloroform has DeltaH("vaporization")=29.2 kJ//"mol" and boils at 61.2...

    Text Solution

    |

  10. The entropy if vaporisation of benzene is 85JK^(-1) mol^(-1). When 117...

    Text Solution

    |

  11. Identify the correct statement regarding entropy

    Text Solution

    |

  12. Calculate DeltaS for following process : underset("at" 100K)(X(s)) ...

    Text Solution

    |

  13. For a perfectly crystalline solid C(p.m.)=aT^(3), where ais constant. ...

    Text Solution

    |

  14. Consider the following spontaneous reaction 3X(2)(g)rarr2X(3)(g). What...

    Text Solution

    |

  15. For the reaction 2H(g)rarr H(2)(g), the sign of DeltaH and DeltaS resp...

    Text Solution

    |

  16. Consider the following reaction. C(6)H(6)(l)+(15)/(2)O(2)(g)rarr6CO(...

    Text Solution

    |

  17. Consider the following reaction at temperature T : CH(2)=CH(2)(g) +...

    Text Solution

    |

  18. For a process to be spontaneous, DeltaG must be………… .

    Text Solution

    |

  19. For a reaction to occur spontaneously

    Text Solution

    |

  20. Which of the following conditions reagarding a chemical process ensure...

    Text Solution

    |