QJEEM20Cha26a: JEE Main 2020 Chemistry - Class 11 JEEM20Cha26a Solution: For a dimerization reaction, 2A(g) A 2 (g) at 298 K, U o = –20…

Question

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For a dimerization reaction,
2A(g)

\to

A₂(g)
at 298 K,

\Delta

U^o = –20 kJ mol^–1,

\Delta

S^o = –30 JK^–1 mol^–1,
then the

\Delta

G^o will be _____ J.

Accepted Answer

\Delta

G^o =

\Delta

H^o - T

\Delta

S^o

= (

\Delta

U^o +

\Delta

n_gRT) - T

\Delta

S^o

=

\left[ {\left\{ { - 20 + \left( 1 \right){{8.314} \over {1000}} \times 298} \right\} - {{298} \over {1000}} \times \left( { - 30} \right)} \right]

kJ

= – 13.537572 kJ

= – 13537.57 Joule

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