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Why is it necessary to mention the physi...

Why is it necessary to mention the physical state of substances in a thermochemical equation ?

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ICSE-CHEMICAL THERMODYNAMICS -VERY SHORT ANSWER TYPE QUESTIONS
  1. What does the term T DeltaS("total") total represent ?

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  2. What is the free energy criterion for a process to occur spontaneously...

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  3. The free energy change DeltaG = 0, when

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  4. An endothermic process involves an increase in the entropy of the syst...

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  5. An exothermic reaction involves a decrease in the entropy of the syste...

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  6. How is standard free energy change related to equilibrium constant ?

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  7. State the third law of thermodynamics.

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  8. What do you understand by the term thermochemistry ?

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  9. Can chemical energy be transferred into electrical energy? If yes, giv...

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  10. Assertion : DeltaH for an exothermic reaction is negative nad for an e...

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  11. Why is it necessary to mention the physical state of substances in a t...

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  12. Define heat of reaction.

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  13. Is calorific value of a food or a fuel is equal to its heat of combust...

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  14. State whether each of the following processes is exothermic or endothe...

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  15. State whether each of the following processes is exothermic or endothe...

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  16. State whether the following processes is exothermic or endothermic : ...

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  17. State whether each of the following processes is exothermic or endothe...

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  18. Name the heat that is involved in the conversion of one allotropic for...

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  19. What would be the complications if Hess's law were not true?

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  20. What would be the bond formation energy of C-H bond if its bond energy...

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