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Standard XII

Chemistry

Heat of Reaction

Consider the ...

Question

Consider the following statements:
$I$ Change in enthalpy is always smaller than change internal energy.
$I I$ . The variation in enthalpy of a reaction with temperature given by Kirchhoff's equation.
$I I I$ . The entropy change in reversible adiabatic process is equal to zero.
Select the correct answer:

I

and

I I

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I I

and

I I I

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I I I

and

I

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All are correct

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Solution

The correct option is C $I I$ and $I I I$
$Krichhoff's Law describes the enthalpy of a reaction's variation with temperature changes.$
$In a reversible adiabatic process heat is not transferred so$ $δ Q$ $is constants so entropy change is zero.$

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Consider the following statements:I Change in enthalpy is always smaller than change internal energy.II. The variation in enthalpy of a reaction with temperature given by Kirchhoff's equation. III. The entropy change in reversible adiabatic process is equal to zero.Select the correct answer:

The correct option is C II and IIIKrichhoff's Law describes the enthalpy of a reaction's variation with temperature changes.In a reversible adiabatic process heat is not transferred so δQ is constants so entropy change is zero.

The correct option is C $I I$ and $I I I$
$Krichhoff's Law describes the enthalpy of a reaction's variation with temperature changes.$
$In a reversible adiabatic process heat is not transferred so$ $δ Q$ $is constants so entropy change is zero.$