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The standard heat for formation of NO(2)...

The standard heat for formation of `NO_(2)` and `N_(2)O_(4)` are 8.0 and `2.0 kcal mol^(-1)` respectively. The magnitude of heat of dimerization of `NO_(2)` in kcal is :

A

`10.0`

B

`-6.0`

C

`-12.0`

D

`-14.0`

Text Solution

Verified by Experts

The correct Answer is:
D
`2NO_(2)rarr N_(2)O_(4) , Delta H_("Dimerization") = ?`
`Delta H_("Dimerization")=Sigma (Delta H_(f))_(P)-Sigma (Delta H_(f))_(R )`
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ALLEN-THERMODYNAMICS -EXERCISE -3
  1. The heat of combustion of CH(4(g)), C((g)) and H(2(g)) at 25^(@)C are ...

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  2. Standard enthalpy of formation is zero for

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  3. The standard heat for formation of NO(2) and N(2)O(4) are 8.0 and 2.0...

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  4. M is a metal that forms an oxide M(2)O,(1)/(2)M(2)O rarr M+(1)/(4)O(2)...

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  5. According to equation, C(6)H(6)(l)+15//2 O(2)(g)rarr 6CO(2)(g)+3H(2)O(...

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  6. Heat of combustion of CH(4), C(2)H(6), C(2)H(4) and C(2)H(2) gases are...

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  7. The standard enthalpy of formation of CO is -110 kJ and of CO2 is -394...

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  8. If enthalpies of formation of C(2)H(4)(g),CO(2)(g) and H(2)O(l) at 25^...

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  9. The heat of combustion of carbon and monoxide are -394 and -285 KJ mol...

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  10. When a certain amount of ethylene was combusted, 6226 kJ heat was evol...

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  11. Find out the heat evolved in combustion if 112 litre (at 1 atm, 273 K)...

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  12. A person requires 2870 kcal of energy to lead normal daily life. If he...

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  13. On complete combustion of 2 gm methane 26575 cals of heat is generated...

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  14. X gm of ethanal was subjected to combustion in a bomb calorimeter and ...

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  15. The following are heats of reactions : (A) DeltaH(f)^(@) of H(2)O(l)...

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  16. The enthalpy combustion of a substance

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  17. The value of Delta H for the combustion of C(s) is - 94.4 Kcal. The he...

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  18. In the combustion of 0.4 g. of CH(4) 0.25 Kcal. Of heat is liberated. ...

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  19. If C(6)H(12)O(6)(s) +6O(2)(g) to 6CO(2)(g)+6H(2)O (l), triangleH=680 K...

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  20. Which of the following equations corresponds to the enthalpy of combus...

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