Home
Class 12
CHEMISTRY
Determine DeltaU^(@) at 300 K for the fo...

Determine `DeltaU^(@)` at 300 K for the following reaction using the listed enthalpies of reaction :
`4CO(g)+8H_(2)(g)rarr3CH_(4)(g)+CO_(2)(g)+2H_(2)O(l)`
`C("graphite")+"1/2 O"_(2)(g)rarrCO(g),DeltaH_(1)^(@)=-110.5kJ`
`CO(g)+"1/2 O"_(2)(g) rarrCO_(2)(g),DeltaH_(2)^(@)=-282.9kJ`
`H_(2)(g)+"1/2 O"_(2)(g)rarrH_(2)O(l),DeltaH_(3)^(@)=-285.8kJ`
`C("graphite")+2H_(2)(g)rarrCH_(4)(g),DeltaH_(4)^(@)=-74.8kJ`

A

`-653.3` kJ

B

`-686.2` kJ

C

`-747.4` kJ

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaH^(@) = -3DeltaH_(1)^(@) +DeltaH_(2)^(@) + 2DeltaH_(3)^(@) + 3DeltaH_(4)^(@) = -747.4` kJ
`DeltaH^(@) = DeltaH^(@) + Deltan_(g) RT`, where `Deltan_(g) = -8`
`=747.4 = DeltaU^(@) - (8 xx 8.314 xx 300)/1000`
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

Determine Delta U^(@) at 300K for the following reaction using the listed enthalpies of reaction : 4CO(g)+8H_(2)(g)to3CH_(4)(g)+CO_(2)(g)+2H_(2)O(l) C("graphite")+(1)/(2)O_(2)(g)to CO(g), DeltaH_(1)^(@)=-110.5KJ CO(g)(1)/(2)O_(2)(g)toCO_(2)(g), DeltaH_(2)^(@)=-282.9KJ H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(l), DeltaH_(3)^(@)=-285.8KJ C("graphite")+2H_(2)(g)to CH_(4)(g), DeltaH_(4)^(@)=-74.8KJ

Calculate the standard enthalpy of reaction for the following reaction using the listed enthalpies of reaction : 3Co(s)+2O_(2)(g)rarrCo_(3)O_(4)(s) 2 Co(s)+O_(2)(g)rarr2CoO(s)," "DeltaH_(1)^(@)=-475.8 kJ 6CoO(s)+O_(2)(g)rarr2Co_(3)O_(4)(s),DeltaH_(2)^(@)=-355.0 kJ

H_(2)(g)+(1)/(2)O_(2)(g)rarrH_(2)O(l), DeltaH =- 286 kJ 2H_(2)(g)+O_(2)(g)rarr2H_(2)O(l)……………kJ(+-?)

Calculate in kJ for the following reaction : C(g) + O_(2)(g) rarr CO_(2)(g) Given that, H_(2)O(g) + C(g) + H_(2)(g) , Delta H = +131 kJ CO(g) + 1/2 O_(2)(g) rarr CO_(2)(g), " " Delta H = -242 kJ H_(2)(g) + 1/2 O_(2)(g) rarr H_(2)O(g), " "DeltaH = -242 kJ

Based on the following thermochemical equations H_(2)O(g)+C(s)rarrCO(g)+H_(2)(g),DeltaH=131KJ CO(g)+1//2O_(2)(g)rarrCO_(2)(g),DeltaH=-282KJ H_(2)(g)+1//2O_(2)(g)rarrH_(2)O(g),DeltaH=-242KJ C(s)+O_(2)(g)rarrCO_(2)(g),DeltaH=XKJ The value of X will be

Determine enthalpy of formation for H_(2)O_(2)(l) , using the listed enthalpies of reaction : N_(2)H_(4)(l)+2H_(2)O_(2)(l)toN_(2)(g)+4H_(2)O(l) , " "Delta_(r)H_(1)^(@)=-818kJ//mol N_(2)H_(4)(l)+O_(2)(g)toN_(2)(g)+2H_(2)O(l) " "Delta_(r)H_(2)^(@)=-622kJ//mol H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l)" "Delta_(r)H_(3)^(@)=-285kJ//mol

Calculate the standard enthalpy of formation of CH_(3)OH(l) from the following data: CH_(3)OH(l)+3/2O_(2)(g) rarr CO_(2)(g)+2H_(2)O(l), …(i), Delta_(r)H_(1)^(Θ)=-726 kJ mol^(-1) C(g)+O_(2)(g) rarr CO_(2)(g), …(ii), Delta_(c )H_(2)^(Θ)=-393 kJ mol^(-1) H_(2)(g)+1/2O_(2)(g) rarr H_(2)O(l), ...(iii), Delta_(f)H_(3)^(Θ)=-286 kJ mol^(-1)

Methanol can be prepared synthetically by heating carbon monoxide and hydrogen gases under pressure in the presence of a catalyst. The reaction is CO(g) +2H_(2)(g) rarr CH_(3)OH(l) Determine the enthalpy of this reaction by an appropriate combinantion of the following data: a. C_(("graphite")) +(1)/(2)O_(2)(g) rarr CO(g), DeltaH^(Theta)=- 110.5kJ mol^(-1) b. C_(("graphite")) +O_(2)(g) rarr CO_(2)(g), DeltaH^(Theta) =- 393.5 kJ mol^(-1) c. H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH^(Theta) =- 285.9kJ mol^(-1) d. CH_(3)OH(l) +(3)/(2)O_(2)(g)rarr CO_(2)(g) +2H_(2)O(l),DeltaH^(Theta) =- 726.6 kJ mol^(-1)

Given the following equations and DeltaH^(@) values, determine the enthalpy of reaction at 298 K for the reaction : C_(2)H_(4)(g)+6F_(2)(g) to 2HF_(4)(g)+4HF(g) H_(2)(g)+F_(2)(g)to2HF(g)+2HF(g)," "DeltaH_(1)^(@)=-537" kJ" C(s)+2F_(2)(g)toCF_(4)(g)," "DeltaH_(2)^(@)=-680" kJ" 2C(s)+2H_(2)(g)toC_(2)H_(4)(g)," "DeltaH_(3)^(@)=52" kJ"

With the help of thermochemical equations given below, determine Delta_(r )H^(Θ) at 298 K for the following reaction: C("graphite")+2H_(2)(g) rarr CH_(4)(g),Delta_(r )H^(Θ) = ? C("graphite")+O_(2)(g) rarr CH_(2)(g), Delta_(r )H^(Θ) = -393.5 kJ mol^(-1) ...(1) H_(2)(g) +1//2O_(2)(g) rarr H_(2)O(l) , Delta_(r )H^(Θ) = -285.8 kJ mol^(-1) ...(2) CO_2(2)(g)+2H_(2)O(l) rarr CH_(4)(g)+2O_(2)(g) , Delta_(r )H^(Θ) = +890.3 kJ mol^(-1) ...(3)

VMC MODULES ENGLISH-THERMODYNAMICS-LEVEL-1
  1. A sample of oxygen gas expands its volume from 3L to 5L against a cons...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  10. The enthalpy of vaporisation of a liquid is 30 kJ mol^(-1) and entropy...

    Text Solution

    |

  11. When the gas is ideal and process is isothermal, then

    Text Solution

    |

  12. A system absorbs 300cal of heat , its volume doubles and temperature r...

    Text Solution

    |

  13. Temperature of one mole of a gas is increased by 1^(@) C at constant p...

    Text Solution

    |

  14. P-V plot for two gases (assuming ideal) during adiabatic processes are...

    Text Solution

    |

  15. Calculate the final temperature of a monoatomic ideal gas that is comp...

    Text Solution

    |

  16. The adsorption of vapours on a clean surface is a spontaneous process ...

    Text Solution

    |

  17. Column-I and Column-II contains four entries each. Entries of Column-I...

    Text Solution

    |

  18. Match Column-I with Column-II and select the correct answer using the ...

    Text Solution

    |

  19. A process is taking place at constant temperature and pressure. Then

    Text Solution

    |

  20. In view of the signs of DeltarG^@ for the following reactions PbO2 +...

    Text Solution

    |