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The reaction: NH(2)CN(s) +(3)/(2)O(2)(...

The reaction:
`NH_(2)CN(s) +(3)/(2)O_(2)(g)rarr N_(2)(g) +CO_(2)(g) +H_(2)O(l)`
Was carried out in a bomb caloriemeter. The heat released was `743 kJ mol^(-1)`. The value of `DeltaH_(300K)` for this reaction would be

A

`-740.5 KJ mol^(-1)`

B

`-741.75 KJ mol^(-1)`

C

`-743.0 KJ mol^(-1)`

D

`-744.25 KJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
In Bomb calorimeter `rArr Delta E = -743 kJ mol^(-1)`
`Delta H=Delta E+Delta n_(g)RT`
`Delta H=-743+(1)/(2)xx8.314xx10^(-3)xx300`
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ALLEN-THERMODYNAMICS -EXERCISE -2
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  2. Heat of reaction for, CO(g)+1//2O(2)(g)rarr CO(2)(g) at constant V is ...

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  3. The reaction: NH(2)CN(s) +(3)/(2)O(2)(g)rarr N(2)(g) +CO(2)(g) +H(2)...

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  4. Theenthalpy of vapourisation of water at 100^(@)C" is 40.63 kJ mol"^(-...

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  5. The difference in Delta H and Delta E for the combustion of methane at...

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  6. For the system S (s) + O(2)(g) rarr SO(2)(g) ?

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  7. For the reaction CO(g)+(1)/(2)O(2)(g)rarr CO(2)(g) Which one of the ...

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  8. Which is true for the combustion of sucrose (C(12)H(22)O(11)) at 25^(@...

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  9. Identify the reaction for which Delta H != Delta E

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  10. The heat of combustion of ethanol determined in a bomb calorimeter is ...

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  11. The difference in Delta H and Delta E for the combustion of methane at...

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  12. Which of the following reactions is Delta H less than Delta E ?

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  13. For a reaction 2X(s)+2Y(s)rarr 2Cl(l)+D(g) The q(p) at 27^(@)C is -...

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  14. The work done in ergs for the reversible expansion of one mole of an i...

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  15. Two liters of N(2) at 0^(@)C and 5 atm pressure is expanded isothermal...

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  16. Two moles of an ideal gas expand spontaneously into a vacuum. The work...

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  17. One mole of a gas occupying 3dm^(3) expands against a constant externa...

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  18. For which reaction from the following, DeltaS will be maximum?

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  19. An adiabatic process is one in which :-

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  20. Entropy means

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