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Estimate the average S-F bond enthalpy i...

Estimate the average `S-F` bond enthalpy in `SF_(6)`. The values of standard enthalpy of formation of `SF_(6)(g),S(g)` and `F(g)` are :-`1100, 274` and `80 kJ mol^(-1)` respectively.

A

520 kJ

B

401 kJ

C

309 kJ

D

254 kJ

Text Solution

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The correct Answer is:
C
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FIITJEE-THERMODYNAMICS AND THERMOCHEMISTRY -ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL-I
  1. Which reaction process with increase in entropy?

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  2. Calculate enthalpy change of the following reaction : CH(2) = CH(2)(...

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  3. Estimate the average S-F bond enthalpy in SF(6). The values of standar...

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  4. The heat of reaction for N(2)+3H(2) rarr 2NH(3) at 27^(@)C is -91.94kJ...

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  5. Given Delta("ioniz")H^(o)(HCN)=45.2 kJ mol^(-1) and Delta("ioniz")H^(o...

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  6. If H(2)(g) <implies 2H(g) Then heat of atomization of H(2) is

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  7. At 298 K in a constant volume calorimeter 0.01 mole of TNT was detonat...

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  8. The difference between heat of reaction and change in internal energy ...

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  9. One mole of an ideal gas expand spontaneously into a vacccum. The work...

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  10. Which of the following processes is an isoentropic process?

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  11. When solid NH(4)NO(3) is dissolved in water at 25^(@)C, the temperatur...

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  12. Which of the following expression represent the work done in reversibl...

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  13. The heats of neutralisation of four acidsA,B,C and D are -13.7,-9.4,-1...

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  14. Which fuel provides the highest calorific value?

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  15. Given at A(s) to A(l), DeltaH =x A(l) to A(g), DeltaH =y The hea...

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

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  17. If, combustion of 4g of CH(4) liberates 2.5kcal of heat, the heat of c...

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  18. AB,A(2) and B(2) are diatomic molecules. If the bond enthalpies of A(2...

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  19. DeltaC(p) for the change, N(2)(g) + 3H(2)(g) = 2NH(3)(g) is

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  20. The heats of oxidation of Mg and Fe are given (a) Mg + 1/2O(2) to Mg...

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