Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are)

Question

Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are) (A) Δ G is positive (B) Δ Ssystem is positive (C) Δ Ssurroundings = 0 (D) Δ H = 0

Tardigrade Admin · Accepted Answer

PLAN When an ideal solution is formed process is spontaneous thus
According to Raoult's law, for an ideal solution

Δ H = 0, Δ V_{mm} = 0

From the relation

Δ G = Δ H - T Δ S

Since,

Δ H = 0

∴ Δ G = - v e

i.e. less than zero, and

Δ S_{sys} = + v e

i.e. more than zero.

Q. Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are)

$Δ G$ is positive

$Δ S_{sys t e m}$ is positive

$Δ S_{s u rro u n d in g s} = 0$

$Δ H = 0$

PLAN When an ideal solution is formed process is spontaneous thus
According to Raoult's law, for an ideal solution
$Δ H = 0, Δ V_{mm} = 0$
From the relation
$Δ G = Δ H - T Δ S$
Since, $Δ H = 0$
$∴ Δ G = - v e$
i.e. less than zero, and $Δ S_{sys} = + v e$
i.e. more than zero.

Q. Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are)

ΔG is positive

ΔSsystem​ is positive

ΔSsurroundings​=0

ΔH=0

PLAN When an ideal solution is formed process is spontaneous thus According to Raoult's law, for an ideal solution ΔH=0,ΔVmm​=0 From the relation ΔG=ΔH−TΔS Since, ΔH=0 ∴ΔG=−ve i.e. less than zero, and ΔSsys​=+ve i.e. more than zero.

$Δ G$ is positive

$Δ S_{sys t e m}$ is positive

$Δ S_{s u rro u n d in g s} = 0$

$Δ H = 0$

PLAN When an ideal solution is formed process is spontaneous thus
According to Raoult's law, for an ideal solution
$Δ H = 0, Δ V_{mm} = 0$
From the relation
$Δ G = Δ H - T Δ S$
Since, $Δ H = 0$
$∴ Δ G = - v e$
i.e. less than zero, and $Δ S_{sys} = + v e$
i.e. more than zero.