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Why heat changes reported are usually en...

Why heat changes reported are usually enthalpy changes and not internal energy changes?

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This is because most of the processes are carried out in open vessels,i.e., at constant pressure.
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PRADEEP-THERMODYNAMICS-ADDITIONAL QUESTIONS(VERY SHORT ANSWER QUESTIONS)
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  2. What is the value of DeltaH in the following reaction at 300 K ? C...

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  3. Why heat changes reported are usually enthalpy changes and not interna...

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  4. Define molar heat capacity and specific heat capacity.

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  5. Why is 'bomb calorimeter ' called so ?

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  6. Two reactions are given below: (i) H(2)O(g)+(1)/(2)O(2)(g) rarrH(2)O...

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  7. Write an expression in the form of a chemical equation of the standard...

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  8. Define the terms : (i) Enthalpy of formation (ii) Enthalpy of combusti...

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  9. What is bond energy? How are the bond energies related to change in en...

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  10. Comment on the bond energies of four C-H bonds present in CH(4).

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  11. What is the limitation of the first law of thermodynamics?

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  12. Write a general expression for the entropy change during a phase trans...

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  13. What is entropy? Give its units.

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  14. Predict the sign of entropy change in the following reaction : (i) O...

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  15. What is the effect of temperature on entropy?

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  16. Entropy of diamond is less than that of graphite.What conclusion do y...

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  17. Explain the terms entropy and free energy.Why does entropy of a solid ...

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  18. What do you meanby Entropy of vaporisation or Entropy of fusion or E...

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  19. Give a statement which includes the main ideas of the first law and se...

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  20. State the second law of thermodynamics.

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