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Hess's law of constant heat summationk i...

Hess's law of constant heat summationk is applied to calculate

A

the enthalpy of a reaction which is not feasible

B

the enthalpy of a reaction which does not go to completion

C

the calforific value of a fuel

D

All of these

Text Solution

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The correct Answer is:
D
There are many compounds that cannot be directly synthesized from their elements. In some cases, the reaction proceeds, too slowly, or side reactions may produce substances other than than the desired compound. In these cases, `Delta_(f) H^(@)` can be determined by an indirect approach, which is based or Hess's law of heat summation (or simply Hess's law).
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