Home
Class 12
CHEMISTRY
The standard heat of formation of CS(2)(...

The standard heat of formation of `CS_(2)(I)` will be, given that the standard heat of combustion of carbon (s), sulphur (s) and `CS_2(1)` are- 393.3,-293.72 and- 1108.76 `"kJ mole"^(-1)` respectively is

A

`-128.02 "KJ mole"^(-1)`

B

`+12.802 "KJ mol"^(-1)`

C

`+128.02 "KJ mol"^(-1)`

D

`-12.802 KJ mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`C_((s))+2S_((s))rarr CS_(2(l)) , Delta H_(f) = ?`
`Delta H_(f)=Sigma (Delta H_("Comb."))_(R )-Sigma (Delta H_("Comb."))_(P)`
`Delta H_(f)=[1xx(-393.3)+2xx(-293.72)]-(-1108.76)`
`Delta H_(f)=+128.02 kJ mol^(-1)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -4|18 Videos

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -2|100 Videos

  • TEST PAPERS

    ALLEN|Exercise MATHEMATICS|2 Videos

  • Thermodynamics And Thermo Chemistry

    ALLEN|Exercise All Questions|40 Videos

Similar Questions

Explore conceptually related problems

The standard heat of formation of carbon disulphide (l) given that standard heat of combustion of carbon (s), sulphur (s) and carbon disulphide (l) are -393.3, -293.72 and -1108.76 KJ mol^(-1) respectively is

Calculate the standard heat of formation of carbon disulphide (l) . Given that the standard heats of combusion of carbon (s) , sulphur (s) and acrbon disulphide (l) are -390, 290.0 , and -1100.0kJ mol^(-1) . Respectively.

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) .

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) ?

Calculate the standard heat of formation of propane if its heat of combustion is -2220.2kj mol^(-1) . The heats of formation of CO_2(g) " and " H_2O(l) are -394 .12 and -286.31 kJ mol^(-1) respectively.

The standard heat of formation (Delta_(f)H_(298)^(0)) of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite are -1560, -393.5 and -286kJ/mol , respectively is _______.

Calculate the resonance energy of isoprene (C_(5)H_(8)) from the data given. Standard Heats of combustion of isoprene, carbon and hydrogen are -3186, -393.5 , and -285.83 kJ mol^(-1) , respectively. Bond energies of C=C, C-C, C-H and H-H bonds are 615, 348, 413 and 435.8 kJ mol^(-1) respectively. Standard heat of sublimation of graphite is 718.3 kJ mol^(-1) .

Compare quantity of heat produced by the combustion of 1.0 g glucose (C_6H_12O_6) with that produced by 1.0g sucrose (C_12H_22O_11) . Given that the standard heats of formation of CO_(2), H_(2)O glucose and sucrose are -393.5, -285.9, -1260 and -2221 kJ mol^(-1) respectively.

In a fuel celll, methanol is used as a fuel and O_(2) is used as oxidizer. The standard enthalpy of combustion of methanol is -726 kJ mol^(-1) . The standard free energies of formation of CH_(3)OH(I), CO_(2)(g) and H_(2)O(I) are -166.3, -394.4 and -237.1 kJ mol^(-1) respectively. The standard free energy change of the reaction will be

Estimate the average S.F bond energy in SF_(6) . The standard heat of formation values of SF_(6)(g),S(g) and F(g) are -1100, 275 and 80 kJ "mol"^(-1) respectively.

ALLEN-THERMODYNAMICS -EXERCISE -3
  1. The Delta(f)H^(Theta) for CO(2)(g), CO(g), and H(2)O(g) are -393.5, -1...

    Text Solution

    |

  2. The heats of combustion of carbon and carbon monoxide are -393.5 and ...

    Text Solution

    |

  3. The standard heat of formation of CS(2)(I) will be, given that the sta...

    Text Solution

    |

  4. The heat of combustion of CH(4(g)), C((g)) and H(2(g)) at 25^(@)C are ...

    Text Solution

    |

  5. Standard enthalpy of formation is zero for

    Text Solution

    |

  6. The standard heat for formation of NO(2) and N(2)O(4) are 8.0 and 2.0...

    Text Solution

    |

  7. M is a metal that forms an oxide M(2)O,(1)/(2)M(2)O rarr M+(1)/(4)O(2)...

    Text Solution

    |

  8. According to equation, C(6)H(6)(l)+15//2 O(2)(g)rarr 6CO(2)(g)+3H(2)O(...

    Text Solution

    |

  9. Heat of combustion of CH(4), C(2)H(6), C(2)H(4) and C(2)H(2) gases are...

    Text Solution

    |

  10. The standard enthalpy of formation of CO is -110 kJ and of CO2 is -394...

    Text Solution

    |

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

    Text Solution

    |

  12. The heat of combustion of carbon and monoxide are -394 and -285 KJ mol...

    Text Solution

    |

  13. When a certain amount of ethylene was combusted, 6226 kJ heat was evol...

    Text Solution

    |

  14. Find out the heat evolved in combustion if 112 litre (at 1 atm, 273 K)...

    Text Solution

    |

  15. A person requires 2870 kcal of energy to lead normal daily life. If he...

    Text Solution

    |

  16. On complete combustion of 2 gm methane 26575 cals of heat is generated...

    Text Solution

    |

  17. X gm of ethanal was subjected to combustion in a bomb calorimeter and ...

    Text Solution

    |

  18. The following are heats of reactions : (A) DeltaH(f)^(@) of H(2)O(l)...

    Text Solution

    |

  19. The enthalpy combustion of a substance

    Text Solution

    |

  20. The value of Delta H for the combustion of C(s) is - 94.4 Kcal. The he...

    Text Solution

    |