Assertion: For the combustion of methane, Δ EΔ H Reason: Δ H is related by Δ E by the expression. Δ H=Δ E+Δ n R T

Question

Assertion: For the combustion of methane, Δ E>Δ H Reason: Δ H is related by Δ E by the expression. Δ H=Δ E+Δ n R T (A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. (B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (C) If Assertion is true but Reason is false. (D) If both Assertion and Reason are false.

Tardigrade Admin · Accepted Answer

Combustion of methane is CH 4+2 O 2 longrightarrow CO 2+2 H 2 O The relation in between Δ H and Δ E is Δ H=Δ F+Δ n R T Δ n =np-nr=1-3=-2 Δ H =Δ E-2 T So, Δ H <Δ E Hence, reason is correct explanation of assertion.

Q. Assertion : For the combustion of methane, $Δ E > Δ H$
Reason : $Δ H$ is related by $Δ E$ by the expression. $Δ H = Δ E + Δ n RT$

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

If Assertion is true but Reason is false.

If both Assertion and Reason are false.

Combustion of methane is
$C H_{4} + 2 O_{2} ⟶ C O_{2} + 2 H_{2} O$
The relation in between $Δ H$ and $Δ E$ is
$Δ H = Δ F + Δ n RT$
$Δ n = n_{p} - n_{r} = 1 - 3 = - 2$
$Δ H = Δ E - 2 T$
So, $Δ H < Δ E$
Hence, reason is correct explanation of assertion.

Q. Assertion : For the combustion of methane, ΔE>ΔH Reason : ΔH is related by ΔE by the expression. ΔH=ΔE+ΔnRT