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Define standard enthalpy of formation ....

Define standard enthalpy of formation .

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Explain standard enthalpy of formation (Delta_(f)H^(@)) .

Calculate the standard enthalpy of formation of liquid benzene (C_(6)H_(6)) . Given the enthalpies of combustion of Carbons (s), Hydrogen (g) and Benzene (I) are -393.5kJ, -285.83kJ and -3267.0 respecitvely.

The standard enthalpy of formation of NH_(3) is - 46.0 kJ mol^(-1) . If the enthalpy of formation of H_(2) from its atoms is - 436 kJ mol^(-1) and that of N_(2) is - 712 kJ mol^(-1) , the average bond enthalpy of N - H bond is NH_(3) is

Calculate the standard enthaly of formation of Methane. Given that the standard enthalpy of combustion of Methane, carbon and Hydrogen are -893.3kJ, -3.93kJ and -285.8kJ respectively.

Calculate standard free energy of formation of H_2O_((l)) . The standard enthalpy of formation of H_2O_((l)) is 285.85 kJ and standard entropies of H_(2(g)), O_(2(g)) and H_2O_((l)) are130.5, 205.0 and 70.3 J. K^(-1) "mole"^(-1) respectively.

The enthalpy of combustion of one mole of benzene,carbon and hydrogen are-3267 kj mol-1 ,-393.5 kj mol^-1 and -285.8 kj mol^-1 respectively.Calculate the stnadard enthalpy of formation of benzene.

SUBHASH PUBLICATION-SUPER MODEL QUESTION PAPER (FOR PRACTICE)-PART-D
  1. Distinguish between a sigma and a pi bond.

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  2. Predict the shapes of the following molecules using the VSEPR model (...

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  3. Define standard enthalpy of formation .

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  4. The ionization constant of benzoic acid is 6.46xx10^(-5) and K(sp) for...

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  5. Calculate the pH of the solution formed when 2g of TIOH dissolved in ...

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  6. For the following equation K(c)=6.3xx10^(14) at 1000L. NO(g)+O(3)(g)...

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  7. Define Le-Chatelier's principle.

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  8. What is common ion effect? Give an example.

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  9. Explain the structure of diborane molecule.

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  10. Why does BF(3) behaves as Lewis acid?

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  11. Write the principles for the estimation of nitrogen by Kjeldahl's meth...

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  12. What are carbonions? How are they formed?

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  13. A plastic jug contains 3.5 liters of milk. Calculate the volume of mil...

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  14. How many moles of methane is required to produce 88 g of CO(2) after c...

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  15. Define empirical formula.

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  16. State the three postulates of Bohr's theory of hydrogen atom.

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  17. State Pauli's exclusion principle. Give the possible values of l for n...

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  18. State Dalton's law of partial presuures.

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  19. Hydrogen gas at room temperature occupies a volume of 4.47 litres at 1...

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  20. Write ideal gas equation for one mole of gas.

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