Assertion -In the following reaction- Cs- O 2 g- C O 2 g- H- U-RT Reason- - H is related to - U by the equation- - H- U- n g RT

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Standard XII

Chemistry

Third Law of Thermodynamics

Assertion :In...

Question

Assertion :In the following reaction:
$C (s) + O_{2} (g) ⟶ C O_{2} (g); Δ H = Δ U - R T$ Reason: $Δ H$ is related to $Δ U$ by the equation,
$Δ H = Δ U - n_{g} R T$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
$Option D is correct.$

$Δ n = 0$ $for reaction given in Assertion as solid C is not taken while calculating it.$

$Δ H = Δ U - P Δ V$

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Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Assertion :In the following reaction:C(s)+O2(g)⟶CO2(g);ΔH=ΔU−RT Reason: ΔH is related to ΔU by the equation,ΔH=ΔU−ngRT

The correct option is D Both Assertion and Reason are incorrectOption D is correct.Δn=0 for reaction given in Assertion as solid C is not taken while calculating it.ΔH=ΔU−PΔV

Assertion :In the following reaction:
$C (s) + O_{2} (g) ⟶ C O_{2} (g); Δ H = Δ U - R T$ Reason: $Δ H$ is related to $Δ U$ by the equation,
$Δ H = Δ U - n_{g} R T$

The correct option is D Both Assertion and Reason are incorrect
$Option D is correct.$

$Δ n = 0$ $for reaction given in Assertion as solid C is not taken while calculating it.$

$Δ H = Δ U - P Δ V$