Home
Class 12
CHEMISTRY
In a constant volume calorimeter 5g of a...

In a constant volume calorimeter 5g of a gas with molecular weight 40 was burnt in excess of oxygen at 298 K.the temperature of the calorimeter was found to increase from 298 K to 298.75 K due to combustion process.Given that the heat capacity of the calorimeter is 2.5 kJ K^(-1),a numerical value for the DeltaU of combustion of the gas in kJ mol^(-1) is

A

15

B

12

C

90

D

8

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 1

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|28 Videos

  • MOCK TEST 11

    AAKASH INSTITUTE ENGLISH|Exercise Example|14 Videos

Similar Questions

Explore conceptually related problems

In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess oxygen at 298.0 K . The temperature of the calorimeter was found to increase from 298.0 K to 298.45 K due to the combustion process. Given that the heat capacity of the calorimeter is 2.5 kJ K^(-1) , find the numerical value for the enthalpy of combustion of the gas in kJ mol^(-1)

In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess oxygen at 298.0 K . The temperature of the calorimeter was found to increase from 298.0 K to 298.45 K due to the combustion process. Given that the heat capacity of the calorimeter is 2.5 kJ K^(-1) , find the numerical value for the enthalpy of combustion of the gas in kJ mol^(-1)

A 1.250 g sample of octane (C_(8)H_(18)) is burned in excess of oxygen in a bomb calorimeter. The temperature of calorimeter rises from 294.05 K to 300.78 K . If heat capacity of the calorimeter is 8.93 kJ K^(-1) , find the heat transferred to calorimeter.

The temperature of a bomb calorimeter was found to rise by 1.617K when a current of 3.20A was passed for 27s from a 12V source. Calculate the calorimeter constant.

1g of graphite is burnt in a bomb calorimeter in excess of oxygen at 298 K and 1 atmospheric pressure according to the equation C (graphite) +O_(2)(g)rarrCO_(2)(g) During the reaction, temperature rises from 298 K to 299 K. If the heat capacity of the bomb calorimeter is 20.7kJ/K, what is the enthalpy change for the above reaction at 298 K and 1 atm?

The heat of combusion of benzne determined in a bomb calorimeter is -870Kcal mol^(-1) at 298 K . The value of DeltaE for the reaction is

0.562g of graphite kept in a bomb calorimeter in excess of oxygen at 298K and 1 atmospheric pressure was burnt according to the equation, C_(Graph ite)+O_(2(g))rarr CO_(2(g)) durgin the reaction, temperature rises from 298K o 298.89K . If the heat capacity of the calorimeter and its contents is 20.7 kJ//K , what is the enthalpy change for the above reaction at 298K and 1 atm ?

x g sample of NH_(4)NO_(3) is decomposed in a Bomb calorimeter. The temperature of calorimeter increase by 4^(@)C . The heat capacity of the system is 1.25 " kJ"//.^(@)C . Calculate the value of x. Given molar heat of decomposition of NH_(4)NO_(3) at constant volume is 400 kJ " mol"^(-1) .

When 2 g of benzene are burnt in a bomb calorimeter, the heat produced is 83.6 kJ at 298 K. Calculate the enthalpy of combustion of benzene.

The heat of combustion of H_(2)(g) at constant pressure and 300k is -280kJ mol^(-1) . What will be the heat of combustion at constant volume and at 300K ?

AAKASH INSTITUTE ENGLISH-MOCK TEST 10-Example
  1. Work done during isothermal expansion of one mole of an ideal gas from...

    Text Solution

    |

  2. Out of the following, choose the one which is not a part of internal e...

    Text Solution

    |

  3. Pressure volume (PV) work done by an ideal gas system at constant volu...

    Text Solution

    |

  4. 6mole of an ideal gas expand isothermally and reversibly from a volume...

    Text Solution

    |

  5. An ideal gas expands against a constant external pressure of 2.0 atmos...

    Text Solution

    |

  6. The equation 1/2H2(g)+1/2Cl2rarrHCl,DeltaH°= -24080cal means

    Text Solution

    |

  7. when 50 cm^3 of 0.2 N H3SO4 is mixed with 50 cm^3 of 1nKOH,the heat li...

    Text Solution

    |

  8. molar heat capacity of Aluminium is 25 JK^(-1)mol^(-1)the heat necessa...

    Text Solution

    |

  9. What will be the heat of formation of ethane, if the heat of combustio...

    Text Solution

    |

  10. If for H2 gas,Cp -Cv=a and for O2 gas,Cp-Cv=b,where Cp and Cv is heat ...

    Text Solution

    |

  11. In a constant volume calorimeter 5g of a gas with molecular weight 40 ...

    Text Solution

    |

  12. When 1 mole of oxalic acid is treated with excess of NaOH in dilute aq...

    Text Solution

    |

  13. The bond dissociation energies of X2, Y2 and XY are in the ratio of 1 ...

    Text Solution

    |

  14. The species which by definition has zero standard molar enthalpy of fo...

    Text Solution

    |

  15. One mole of anhydrous salt AB dissolves in water and liberates 15 J mo...

    Text Solution

    |

  16. choose the reaction in which DeltaH is not equal to DeltaU

    Text Solution

    |

  17. Hess's law is application for the determination of heat of

    Text Solution

    |

  18. Enthalpy (H) is equal to

    Text Solution

    |

  19. If Delta(f)H^(@)(C(2)H(4)) and Delta(f)H^(@)(C(2)H(6)) are x(1) and x...

    Text Solution

    |

  20. heat of combustion of gaseous compounds A(molar mass =16) B(molar mass...

    Text Solution

    |