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Given that ΔH = 0 for mixing of two gases. Explain whether the diffusion of these gases into each other in a closed container is a spontaneous process or not? |
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Answer» ntaneity of any process mainly DEPENDS on the sign of Gibb’s free energy. A negative ∆G MEANS the reaction will be spontaneous included contribution of the other factors like enthalpy(H) and entropy(S).o In case of DIFFUSION of the gases, the VOLUME will be increased, therefore entropy will increase i.e. ∆S = positive.Hence in the relation, ∆G= ∆H - T∆Sdespite of ∆H being 0 ,∆G will be negative (as positive value of ∆S will give a more negative T∆S)• ∆H=0 ; ∆G= -T∆S= negative. |
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