Home
Class 12
CHEMISTRY
Consider the reaction at 300 K C(6) ...

Consider the reaction at 300 K
`C_(6) H_(6) (l)+(15)/(2)O_(2)(g)rarr6CO_(2)(g)+3H_(2)O(l), DeltaH = - 3271 kJ`
What is `DeltaU` for the combustion of 1.5 mole of benzene at `27^(@)C` ?

A

`-3271` kJ

B

`-9813` kJ

C

`-4906.5` kJ

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
From given reaction `Deltan_(g) = 12-15 = -3`
so, `DeltaE^(@) = DeltaH^(@) - Deltan_(g)RT = -6542 + 3RT`
for 1.5 mole, `DeltaE^(@) = 1.5/2 (-6542 + 3RT) = -4900.9` kJ
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise LEVEL-2|50 Videos

  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise LEVEL-2 (NUMERICAL VALUE TYPE)|15 Videos

  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise LEVEL-0 (LONG ANSWER TYPE (5 MARKS))|6 Videos

  • THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise JEE ADVANCED (ARCHIVE)|31 Videos

  • THERMODYNAMICS & THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise Impeccable|48 Videos

Similar Questions

Explore conceptually related problems

Consider the reacting at 300K C_(6)H_(6)(l)+(15)/(2)O_(2)(l)rarr 6CO_(2)(g)+3H_(2)O(l),DeltaH=-3271 kJ What is DeltaU for the combustion of 1.5 mole of benzene at 27^(@)C ?

Benzene burns according to the following equation at 300K (R=8.314J mol e^(-1)K^(-1)) 2C_(6)H_(6)(l)+15O_(2)(g)rarr12CO_(2)(g)+6H_(2)O(l) " "DeltaH^(@)=-6542kJ //mol What is the DeltaE^(@) for the combustion of 1.5 mol of benzene

C_(4)H_(10)+(13)/(2)O_(2)(g)rarr4CO_(2)(g)+5H_(2)O(l), DeltaH =- 2878 kJ DeltaH is the heat of……….of butane gas.

Consider the following reaction. C_(6)H_(6)(l)+(15)/(2)O_(2)(g)rarr6CO_(2)(g)+3H_(2)O(g) signs of DeltaH, DeltaS and DeltaG for the above reaction will be

CH_(4)(g) +2O_(2)(g) rarr CO_(2)(g) +2H_(2)O(l), DeltaH =- 890 kJ what is the calorific or fuel value of 1kg of CH_(4) ?

For the reaction C_(3)H_(8)(g)+5O_(2)(g)rarr3CO_(2)(g)+4H_(2)O(l) at constant temperature, DeltaH-DeltaU is

At 27^(@) C , the combustion of ethane takes place according to the reaction C_(2) H_(6)(g) + 7/2O_(2)(g) rightarrow 2CO_(2)(g) + 3H_(2)O(l) Delta E - Delta H for this reaction at 27^(@)C will be

H_(2)O(g) rarr H_(2)O(l), DeltaH =- 40.7 kJ DeltaH is the heat of……………….of water.

For the reaction : C_(2)H_(5)OH(l)+3O_(2)(g)rarr2CO_(2)(g)+3H_(2)O(g) if Delta U^(@)= -1373 kJ mol^(-1) at 298 K . Calculate Delta H^(@)

The heat evolved in the combustion of benzene is given by the equation C_(6)H_(6)(l)+7(1)/(2)O_(2)(g)to 6CO_(2)(g)+3H_(2)O(l) , Delta H =- 781 Kcal mol^(-1) Which of the following quantities of heat will be evolved when 39 g of benzene is burnt in an open container

VMC MODULES ENGLISH-THERMODYNAMICS-LEVEL-1
  1. The work done in ergs for the reversible expansion of one mole of an i...

    Text Solution

    |

  2. The molar heat capacities at constant pressure (assumed constant with ...

    Text Solution

    |

  3. Consider the reaction at 300 K C(6) H(6) (l)+(15)/(2)O(2)(g)rarr6C...

    Text Solution

    |

  4. Give the name of the following reaction: C(2)H(5)Br+C(2)H(5)ON a to ...

    Text Solution

    |

  5. One mole of solid Zn is placed in excess of dilute H(2)SO(4) at 27^(@)...

    Text Solution

    |

  6. The enthalpy change (DeltaH) for the reaction N2(g) + 3H2 (g) to 2N...

    Text Solution

    |

  7. When 1 g of ice at 0^(@)C melts to form 1 g of water at 0^(@)C then, i...

    Text Solution

    |

  8. 130 g of Zn is dissolved in dilute sulphuric acid in an open beaker . ...

    Text Solution

    |

  9. The ammount of heat required to raise the temperature of 1 mole of dia...

    Text Solution

    |

  10. Calculat average molar heat capacity at constant volume of gaseous mix...

    Text Solution

    |

  11. In the isothermal reversible compression of 52.0m mol of a perfect gas...

    Text Solution

    |

  12. A sample of oxygen gas expands its volume from 3L to 5L against a cons...

    Text Solution

    |

  13. A : Work done by a gas in isothermal expension is more than the work d...

    Text Solution

    |

  14. Determine DeltaU^(@) at 300 K for the following reaction using the lis...

    Text Solution

    |

  15. From the given table answer the following questions: Reaction: H(...

    Text Solution

    |

  16. Calculate the free energy change at 298 K for the reaction, Br(2)(l)...

    Text Solution

    |

  17. One mole of an ideal gas is expanded from a volume of 3L to 5L under a...

    Text Solution

    |

  18. For the reaction 2HgO(s) rarr 2Hg(l) + O(2)(g)

    Text Solution

    |

  19. Predict which of the following reaction(s) has a positive entropy chan...

    Text Solution

    |

  20. Which of the following is/are state function?

    Text Solution

    |