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Comment on the thermodynamic stability o...

Comment on the thermodynamic stability of NO(g), given,
(i) `1/2 N_(2)(g) + 1/2O_(2)(g) to NO(g)`
`Delta_(r)H^(@) = 90 kJ mol^(-1)`
(ii)`NO(g) + 1/2 O_(2)(g) to NO_(2)(g)`
`Delta_(r)H^(@) = -74 kJ mol^(-1)`.

Text Solution

Verified by Experts

Since `Delta_(r)H^(@)` is + ve i.e., enthalpy of formation of NO is positive so NO(g) is unstable.But `NO_(2)(g)` is formed because energy is released.
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