SATHEE: Thermodynamics and Thermochemistry 1 Question 40

Thermodynamics and Thermochemistry 1 Question 40

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

(2013 Adv.)

(a) $Δ G$ is positive

(b) $Δ S_{system}$ is positive

(d) $Δ H = 0$

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Solution:

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

From the relation

$Δ H = 0, Δ V_{min} = 0$

$Δ G = Δ H - T Δ S$

Since,

$Δ H = 0$

$∴ Δ G = -$ ve

i.e. less than zero. and $Δ S_{surroundings} = 0$

Therefore, $Δ S_{sys} = +$ ve

i.e. more than zero.

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Thermodynamics and Thermochemistry 1 Question 40

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

Solution:

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