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Why is the concept of standard state nec...

Why is the concept of standard state necessary? What do you mean by the standard state of iron at `1500^(@)C?`

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Second part: The standard state of iron at `1500^(@)C` refers to the state of pure iron at `1500^(@)C` and 1 atm pressure.
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CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-WARM UP EXERCISE
  1. Show that the difference between the heat of reactionn at constant pre...

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  2. What do you mean by the standard state of a substance? Is 25^(@)C the ...

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  3. Why is the concept of standard state necessary? What do you mean by th...

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  4. Mention the standard states of the following elements at 25^(@)C and 1...

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  5. Why is DeltaH=DeltaU for the following two reactions? Explain. (i) N...

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  6. Why does the value of DeltaH for a chemical reaction depend on the phy...

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  7. Give an example of a reaction for each of the following relations betw...

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  8. Give an example of a physical change for each of the following relatio...

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  9. For which element in each of the following pairs has the standard heat...

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  10. In which of the following reactions At 25^(@)C, does the standard enth...

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  11. Which one of the given reactions indicates the formation reaction of t...

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  12. At 25^(@)C the standard heat of formation of liquid benzene is +49.0 k...

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  13. The standard heat of combustion of solid naphthalene [C(10)H(8)(s)] at...

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  14. Give an example of a combustion reaction whose standard enthalpy chang...

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  15. The standard enthalpy of combustion of C(x)H(y)(l) at 25^(@)C is Q kJ*...

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  16. The standard heats of combustion of CH(4)(g) and C(2)H(6)(g) are -890k...

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  17. Define: (i) Enthalpy of fusion, (ii) Enthalpy of vaporisation, (iii) E...

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  18. Identify whether the enthalpy of the initial state is greater than, le...

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  19. At a given temperature and pressure, the enthalpies of condensation an...

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  20. Why are the changes in enthalpies for the given processes the same? (i...

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