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

Calculate the entropy change in surroundings when `1.00` mol of `H_(2)O(l)` is formed under standard conditions, `Delta_(r )H^(Θ) = -286 kJ mol^(-1)`.

Text Solution

Verified by Experts

It is given that 286 given that 286 kJ `"mol"^(-1)` of heat is evolved on the formation of 1 mol of `H_(2)O_((l)).` Thus, an equal amount of heat will be absorbed by the surroundings.
`q_("surr")=+286 kJ "mol"^(-1)`
Entropy change `(DeltaS_("surr"))` for the surroundings =`(q_("surr"))/(7)`
`=(286 kJ "mol"^(-1))/(298 J)`
`:. DeltaS_("surr")=957.73 J "mol"^(-1)J^(-1)`
Promotional Banner

Topper's Solved these Questions

  • THE S-BLOCK ELEMENTS

    NCERT ENGLISH|Exercise EXERCISE|32 Videos

Similar Questions

Explore conceptually related problems

Calculate the entropy change in surroundings when 1.00 mole of H_2O(l) is formed under standard conditions. Delta_fH^@ = -286 kJ mol^(-1)

Calculate the entropy change for vaporization of 1mol of liquid water to steam at 100^(@)C , if Delta_(V)H = 40.8 kJ mol^(-1) .

Calculate the entropy changes of fusion and vapourisation for chlorine from the following data: Delta_(fus)H = 6.40 kJ mol^(-1) , melting point =- 100^(@)C Delta_(vap)H = 20.4 kJ mol^(-1) , boiling point =- 30^(@)C

Calculate the enthalpy change of freezing of 1.0 mol of water at 10^(@)C to ice at -10^(@)C, Delta_(fus)H=6.03 kJ mol^(-1) at 0^(@)C . C_(P)[H_(2)O(l)]=75.3 J mol^(-1) K^(-1) C_(P)[H_(2)O(s)]=36.8 J mol^(-1) K^(-1)

Calculate the entropy change of n -hexane when 1mol of it evaporates at 341.7K (Delta_(vap)H^(Theta) = 290.0 kJ mol^(-1))

Calculate the resonance enegry of NO_(2) ( :O-N=O: ) The measured enthalpy formation of NO_(2)(Delta_(f)H^(Theta)) is 34 kJ mol^(-1) . The bond energies given are: N -O rArr 222 kJ mol^(-1) N -= N rArr 946 kJ mol^(-1) O = O rArr 498 kJ mol^(-1) N = O rArr 607 kJ mol^(-1)

Find the entropy change when 90 g of H_(2)O at 10^(@) C was converted into steam at 100^(@) C. [ Given C_(P)(H_(2)O)=75.29 JK^(-1)mol^(-1) and Delta H_("vap")=43.932 JK^(-1)mol^(-1) ]

Calculate the enthalpy change during the reaction : H_(2(g))+Br_(2(g))rarr 2HBr_((g)) Given, e_(H-H)=435kJ mol^(-1),e_(Br-Br)=192kJ mol^(-1) and e_(H-Br)=368kJ mol^(-1).

Standard molar enthalpy of formation, Delta_(f) H^(Θ) is just a special case of enthalpy of reaction, Delta_(r) H^(Θ) . Is the Delta_(r) H^(Θ) same as standard molar enthalpy of formation ? Given reason for your answer. CaO (s) + CO_(2) (g) rarr CaCO_(3) (s) , Delta_(f) H^(Θ) = - 178.3 kJ mol^(-1)

Calculate the resonance enegry of N_(2)O form the following data Delta_(f)H^(Theta) of N_(2)O = 82 kJ mol^(-1) Bond enegry of N-=N, N=N, O=O, and N=O bond is 946, 418, 498 , and 607 kJ mol^(-1) , respectively.

NCERT ENGLISH-THERMODYNAMICS-All Questions
  1. one mole an ideal gas having volume 2 litre and at a pressure of 10...

    Text Solution

    |

  2. If water vapour is assumed to be a perfect gas, molar enthalpy change ...

    Text Solution

    |

  3. Calculate DeltaG^(Theta) for the conversion of oxygen to ozone, ((3)/(...

    Text Solution

    |

  4. Find out the value of equilibrium constant for the following reaction ...

    Text Solution

    |

  5. Choose the correct answer. A thermodynamic state function is a quanti...

    Text Solution

    |

  6. The enthalpy of combustion of methane, graphite and dihydrogen at 298 ...

    Text Solution

    |

  7. In a process, 701 J of heat is absorbed by a system and 394 J of work ...

    Text Solution

    |

  8. The reaction of cyanamide, NH(2)CN(s), with dioxygen was carried out i...

    Text Solution

    |

  9. Calculate the number of kJ of heat necessary to raise the temperature ...

    Text Solution

    |

  10. Find the value of Delta(f) H^(@) for the reaction N(2) O(4) (g) + 3 ...

    Text Solution

    |

  11. Given N(2)(g)+3H(2)(g)rarr2NH(3)(g),Delta(r)H^(Ө)= -92.4 kJ mol^(-1...

    Text Solution

    |

  12. Calculate the standard enthalpy of formation of CH(3)OH(l) from the fo...

    Text Solution

    |

  13. Calculate the enthalpy change for the process C Cl(4)(g) rarr C(g)+4...

    Text Solution

    |

  14. For an isolated system, DeltaU=0, what will be Delta S?

    Text Solution

    |

  15. For the reaction at 298 K 2A+B rarr C DeltaH=400 kJ mol^(-1) and D...

    Text Solution

    |

  16. For the reaction 2Cl(g) rarr Cl(2)(g), what are the signs of DeltaH ...

    Text Solution

    |

  17. For the reaction, 2A(g)+B(g) rarr 2D(g) DeltaU^(Θ)=-10.5 kJ and De...

    Text Solution

    |

  18. The equilibrium constant for a reaction is 10. What will be the value ...

    Text Solution

    |

  19. Comment on the thermodynamic stability of NO(g), given 1/2N(2)(g)+1/...

    Text Solution

    |

  20. Calculate the entropy change in surroundings when 1.00 mol of H(2)O(l)...

    Text Solution

    |