Home
Class 11
CHEMISTRY
The heat of combustion of C, S and CS(2)...

The heat of combustion of C, S and `CS_(2)` are `-393.3kJ, -293.7kJ and -1108.76kJ.` What will be the heat of formation of `CS_(2)` ?

A

`-128.02kJ`

B

`+970kJ`

C

`+1108.7kJ`

D

`+12kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`C+2S rarr CS_(2)`
`DeltaH=SigmaDeltaH_(P)-SigmaDeltaH_(R)=-1108.76-[-393.3+2xx(-293.7)]`
`=-1108.76+393.3+587.4=-"128.02 kJ"`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NCERT FINGERTIPS|Exercise Spontaneity|30 Videos

  • THERMODYNAMICS

    NCERT FINGERTIPS|Exercise Gibbs Energy Change And Equilibrium|4 Videos

  • THERMODYNAMICS

    NCERT FINGERTIPS|Exercise Enthalpy Change Of A Reaction|13 Videos

  • THE S-BLOCK ELEMENTS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

The heats of combustion for C, H_(2) and CH_(4) are -349, -241.8 and -906.7 kJ respectively. The heat of formation of CH_(4) is

Calculate standard heat of formation of CS_(2) . Given that standard heat of combustion of C,S and CS_(2) are -393.3,-293.72 and -1108.76kJ mol^(-1) .

Ethylene on combustion gives carbon dioxide and water. Its heat of combustion is 1410.0 kJ mol^(-1) . If the heat of formation of CO_(2) and H_(2)O are 393.3 kJ and 286.2 kJ , respectively. Calculate the heat of formation of ethylene.

The heat of combustion of carbon and monoxide are -394 and -285 KJ mol^(-1) respectively. The heat of formation of CO in KJ mol^(-1) is :-

NCERT FINGERTIPS-THERMODYNAMICS-Enthalpies For Different Type Of Reaction
  1. What will be the amount of heat evolved by burning 10 L of methane und...

    Text Solution

    |

  2. For a reaction, C((s))+O(2(g))rarrCO(2(g)) What is the relation betw...

    Text Solution

    |

  3. The heat of combustion of C, S and CS(2) are -393.3kJ, -293.7kJ and -1...

    Text Solution

    |

  4. How much heat is evolved if 3.2 g of methane is burnt and if the heat ...

    Text Solution

    |

  5. What will be the enthalpy of combustion of carbon to produce carbon mo...

    Text Solution

    |

  6. Two reactions are given below : C("(graphite)")+O(2(g))rarrCO(2(g)),...

    Text Solution

    |

  7. Which of the following relationships is not correct ?

    Text Solution

    |

  8. Which of the following is not a correct statement about enthalpy of so...

    Text Solution

    |

  9. The enthalpy of solution of sodium chloride is 4 kJ mol^(-1) and its e...

    Text Solution

    |

  10. Study the figure given below and mark the correct expression. The...

    Text Solution

    |

  11. Match the column I with column II and mark the appropriate choice.

    Text Solution

    |

  12. The amount of heat evolved when 0.50 mole of HCl is mixed with 0.30 mo...

    Text Solution

    |

  13. Which of the following reactions will have the value of enthalpy of ne...

    Text Solution

    |

  14. Bond energies of H-H and Cl-Cl are "430 kJ mol"^(-1) and "242 kJ mol"^...

    Text Solution

    |

  15. What will be DeltaH for the reaction, CH(2)Cl(2)rarrC+2H+2Cl? (B.E...

    Text Solution

    |

  16. DeltaH for the reaction, OF(2)+H(2)OrarrO(2)+2HF (B.E. of O-F, O-H, ...

    Text Solution

    |

  17. Dissociation of water takes place in two steps : H(2)OrarrH+OH," ...

    Text Solution

    |

  18. Bond energies of few bonds are given below : Cl-Cl="242.8 kJ mol"^(-...

    Text Solution

    |

  19. Which is the correct order of bond energy of single, double and triple...

    Text Solution

    |

  20. Which thermochemical process is shown by the following figure?

    Text Solution

    |