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What is enthalpy of combustion? Write ch...

What is enthalpy of combustion? Write chemical equation for the enthalpy of combustion of ethanol `(C_(2)H_(5)OH)`.

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### Step-by-Step Solution: 1. **Definition of Enthalpy of Combustion**: - The enthalpy of combustion is defined as the amount of heat energy released when one mole of a substance is completely burned in the presence of excess oxygen at standard conditions (298 K and 1 atm). 2. **Chemical Reaction for Ethanol**: - The chemical formula for ethanol is \( C_2H_5OH \). - When ethanol combusts, it reacts with oxygen to produce carbon dioxide and water. ...
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MODERN PUBLICATION-THERMODYNAMICS-Revision Exercise (Very short answer questions)
  1. What is the basic difference between the two notations Delta(r)H and D...

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  2. How is enthalpy of sublimation related to enthalpy of fusion and entha...

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  3. What is enthalpy of combustion? Write chemical equation for the enthal...

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  4. The standard enthalpy of formation of sulphur dioxide (SO(2)) is -296....

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  5. Define enthalpy of fusion.

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  6. Define Hess's law of constant heat summation.

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  7. What is meant by bond dissociation enthalpy?

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  8. Ammonia is prepared as 3H(2)(g) + N(2)(g) to 2NH(3)(g) What should...

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  9. State first law of thermodynamics.Write it mathematical expression.

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  10. Why are we usually concerned with changes in enthalpy than changes in ...

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  11. Name the two criteria which must be met for a process to be spontaneou...

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  12. Give an example of a chemical reaction for which DeltaH^(@) gt DeltaU^...

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  13. Why do we feel cold on touching a block of ice?

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  14. Delta(f)H^(@) of Fe(2)O(3) is -825 kJ. What is the enthalpy change for...

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  15. The standard enthalpies of formation of three substances A, B and C ar...

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  16. Define molar heat capacity and specific heat capacity.

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  17. What are the units of entropy and free energy?

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  18. Explain the state of a reaction when DeltaG =0.

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  19. Write Gibbs Helmholtz equation giving meanings of the symbols used.

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  20. What is the sign of DeltaS for (i) evaporation of liquid water ? (...

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