Home
Class 12
CHEMISTRY
Given S(C(2)H(6))^(@) = 225 J mol^(-1) K...

Given `S_(C_(2)H_(6))^(@) = 225 J mol^(-1) K^(-1)` ,
`S_(C_(2)H_(4)^(@) = 220 J mol^(-1) K^(-1), S_(H_(2)^(@) = 130 J mol^(-1) K^(-1)`
Then `Delta S^(@)` for the process
`C_(2)H_(4) + H_(2) rightarrow C_(2)H_(6)` is

A

`+25 J`

B

`-125 J`

C

`135 J`

D

`315 J`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (Section - B) Objective Type Questions|35 Videos

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (Section - C) Previous Years Questions|60 Videos

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise Exercise|50 Videos

  • THE SOLID STATE

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION - D) (ASSERTION-REASON TYPE QUESTION)|20 Videos

Similar Questions

Explore conceptually related problems

Given C_(2)H_(2)(g)+H_(2)(g)rarrC_(2)H_(4)(g): DeltaH^(@)=-175 " kJ mol"^(-1) DeltaH_(f(C_(2)H_(4),g))^(@)=50 " kJ mol"^(-1), DeltaH_(f(H_(2)O,l))^(@)=-280 " kJ mol"^(-1), DeltaH_(f(CO_(2)g))^(@)=-390 " kJ mol"^(-1) If DeltaH^(@) is enthalpy of combustion (in kJ "mol"^(-1) ) of C_(2)H_(2) (g), then calculate the value of |(DeltaH^(@))/(257)|

The following are heats of reactions : (A) DeltaH_(f)^(@) of H_(2)O(l)=-68.3kcal mol^(-1) (B) DeltaH_(comb)^(@) of C_(2)H_(2)=-337.2 kcal mol^(-1) (C) DeltaH_(comb)^(@) of C_(2)H_(4)=-363.7Kal mol_(-1) Then the heat charge for the reaction :- C_(2)H_(2)+H_(2)rarrC_(2)H_(4)

When enthyne is passed through a red hot tube, then formation of benzene takes place: Delta_(f)H_((C_(2)H_(2))(g))^(Theta) = 230 kJ mol^(-1) Delta_(f)H_((C_(6)H_(6))(g))^(Theta) = 85kJ mol^(-1) Calculate the standard heat of trimerisation of ethyne to benzene: 3C_(2)H_(2)(g) rarr C_(6)H_(6)(g)

Calculate the standard free energy change for the reaction: H_(2)(g) +I_(2)(g) rarr 2HI(g), DeltaH^(Theta) = 51.9 kJ mol^(-1) Given: S^(Theta) (H_(2)) = 130.6 J K^(-1) mol^(-1) , S^(Theta) (I_(2)) = 116.7 J K^(-1) mol^(-1) and S^(Theta) (HI) =- 206.8 J K^(-1) mol^(-1) .

Calculate the standard free energy change for the reaction: H_(2)(g) +I_(2)(g) rarr 2HI(g), DeltaH^(Theta) = 51.9 kJ mol^(-1) Given: S^(Theta) (H_(2)) = 130.6 J K^(-1) mol^(-1) , S^(Theta) (I_(2)) = 116.7 J K^(-1) mol^(-1) and S^(Theta) (HI) = 206.8 J K^(-1) mol^(-1) .

If Delta_(f)H^(@)(C_(2)H_(4)) and Delta_(f)H^(@)(C_(2)H_(6)) are x_(1) and x_(2) kcal mol^(-1) , then heat of hydrogenation of C_(2)H_(4) is :

Given CaCl_(2)(s) +aq rarr CaCl_(2)(aq): DeltaH^(Theta) = 75 kJ mol^(-1) at 18^(@)C and CaCl_(2).6H_(2)O +aq rarr CaCl_(2)(aq), DeltaH^(Theta) 19 kJ mol^(-1) at 18^(@)C . Find the heat of hydration of CaCl_(2) to CaCl_(2). 6H_(2)O by H_(2)O (g) . The Heat of vaporisation of water may be taken as 2452 J mol^(-1) at 18^(@)C .

K_(p) value for C_(2)H_(4(g))+H_(2(g))rArrC_(2)H_(6(g))is 5xx10^(18)" atm"^(-1)andK_(p)" for C_(2)H_(2)+H_(2(g))rArrC_(2)H_(4(g)) " is "5xx10^(26) " atm"^(-1) at 50^(@)C. Calculate K_(p) for the reaction 2H_(2(g))+C_(2)H_(2(g))rArrC_(2)H_(6(g))

Calcualate Delta_(f)G^(@) "for" (NH_(4)Cl,s) at 310 K. Given : Delta_(f)H^(@)(NH_(4)Cl,s)=-314.5 KJ//"mol," "Delta_(r)C_(p)=0 S_(N_(2)(g))^(@)=192 JK^(-1), " "S_(H_(2)(g))^(@)=130.5 JK^(-1)mol^(-1), S_(Cl_(2))^(@)(g) =233 JK^(-1)"mol"^(-1)," "S^(@)NH_(4)Cl(s)=99.5 JK_(1)"mol"^(-1) All given data are at 300K.

Mole fraction of I_(2) in C_(6) H_(6) is 0.2. Calculate molality of I_(2) in C_(6) H_(6) . (Mw of C_(6) H_(6) = 78 g mol^(-1))

AAKASH INSTITUTE ENGLISH-THERMODYNAMICS-ASSIGNMENT (Section - A) Objective Type Questions
  1. The enthalpy of reaction, 2HC = CH + 5O(2) rightarrow 4CO(2) + 2H(2)O ...

    Text Solution

    |

  2. Calculate heat of formation of isoprene using bond energy data. 5C(s...

    Text Solution

    |

  3. In a flask colourless N2O4 is in equilibrium with brown coloured NO2. ...

    Text Solution

    |

  4. For which of these reactions will there be Delta S positive?

    Text Solution

    |

  5. For stretched rubber, Entropy

    Text Solution

    |

  6. The most random state of H(2)O system is

    Text Solution

    |

  7. Delta S for the reaction , MgCO(3)(s)rarr MgO(s)+CO(2)(g) will be :

    Text Solution

    |

  8. The standard entroples of N(2)(g), H(2) (g) and NH(3) (g) are 191.5, 1...

    Text Solution

    |

  9. What is the increase in entropy when 11.2 L of O(2) are mixed with 11....

    Text Solution

    |

  10. Given S(C(2)H(6))^(@) = 225 J mol^(-1) K^(-1) , S(C(2)H(4)^(@) = 220...

    Text Solution

    |

  11. For the meltig of NaCI heat require is 7.26 kcal mol^(-1) and Delta S ...

    Text Solution

    |

  12. The DeltaS for the reaction 2H(2)(g) + O(2)(g) rightarrow 2H(2)O(I) ...

    Text Solution

    |

  13. Which of the following is correct ?

    Text Solution

    |

  14. Entropy of vaporisation of water at 100^(@)C, if molar heat of vaporis...

    Text Solution

    |

  15. A particular reaction at 27^(@)C for which DeltaH gt 0 and DeltaS gt 0...

    Text Solution

    |

  16. It is impossible for a reaction to take place if (a)Δ H i s + v e an...

    Text Solution

    |

  17. Ths standard free energy change Delta G^(@) is related to K (equilibri...

    Text Solution

    |

  18. The sole criterion for the spontaneity of a process is

    Text Solution

    |

  19. For an endothermic reaction to be spontaneous

    Text Solution

    |

  20. At 27^(@)C for reaction, C(6)H(6)(l)+(15)/(2)O(2)(g)to6CO(2)(g)+3H(2...

    Text Solution

    |