Question

❥Ello

Represent the potential energy/enthalpy change in the following processes graphically.
(a) Throwing a stone from the ground to roof.
(b) (1/2)H2(g) + (1/2)Cl2(g) ⇔ HCL(g) ΔrH⊖ = –92.32 kJ mol–1
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Answer 1

Explanation:

(a) On

throwing stone from ground to the roof we need to supply energy to the stone.

Graphically, it can be represented as

(b) In the

reaction heat is evolved it means the process is followed by decrease in

energy. It can be represented as

Energy

increases in (a) part and decreases in (b). Hence, in process (b), the enthalpy

change is the contributing factor to the spontaneity.