Dissociation of a gas A _2 takes place according to the following chemical reaction. At equilibrium, the total pressure is 1 bar at 300 K . A_2(g) ⇌ 2 A(g) The standard Gibbs energy of formation of the involved substances has been provided below: Substance ∆ G _{ f }^{\circ} \/ kJ mol ^{-1} A_2 -100.00 A -50.832 The degree of dissociation of A _2(g) is given by (x \times 10^{-2}) ^{1 \/ 2} where x= \_\_\_\_ . (Nearest integer). [Given : R =8 J mol ^{-1} K^{-1}, \log 2=0.3010, \log 3=0.48 ] Assume degree of dissociation is not negligible. [22 Jan 2026 Shift 1]

Chemical Equilibrium

Section: Chemistry

Question : 6 of 114

Marks: +1, -0

Dissociation of a gas A2 takes place according to the following chemical reaction. At equilibrium, the total pressure is 1 bar at 300 K .
A2(g)⇌2A(g) The standard Gibbs energy of formation of the involved substances has been provided below:

Substance	∆Gf∘∕kJmol−1
A2	-100.00
A	-50.832

The degree of dissociation of A2(g) is given by (x×10−2)1∕2 where x= ____ . (Nearest integer).
[Given : R=8Jmol−1K−1,log‌2=0.3010,log‌3=0.48 ]
Assume degree of dissociation is not negligible.

[22 Jan 2026 Shift 1]

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