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Represent the potential energy/enthalpy ...

Represent the potential energy/enthalpy change in the following processes graphically.
(a) Throwing a stone from the ground to roof.
(b) `(1)/(2) H_(2) (g) + (1)/(2) Cl_(2) (g) hArr HCl (g) Delta_(r) H^(Θ) = - 92.32 kJ mol^(-1)`
In which of the processes potential energy/enthalpy change is contributing factor to the spontaneity ?

Text Solution

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Representation of potential energy/enthalpy change in the following processes.
(a) Throwing a stone from the ground to roof.

(b) `1/2H_(2)(g) + 1/2Cl_(2)(g) +HCl(g), Delta_(r)H^(@) = -92.32 k J mol^(-1)`

Energy increases in (a) and it decreases in (b) process. Hence, in process (b), enthalpy change is the contributing factor to the spontaneity.
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