In which of the following changes at constant pressure is work done by system on surrounding? By the surrounding on system ?
`{:("Initial state",,"Final state"),("(i) "H_(2)O(g),to,H_(2)O(l)),("(ii) "H_(2)O(s),to,H_(2)O(g)),("(iii) "H_(2)O(l),to,H_(2)O(s)),("(iv) "3H_(2)(g)+N_(2)(g),to,2NH_(3)(g)),("(v) "CaCO_(3)(s),to,CaO(s)+CO_(2)(g)):}`

Explanation

To determine in which of the following changes at constant pressure work is done by the system on the surroundings and by the surroundings on the system, we need to analyze the changes in volume (ΔV) for each reaction. The work done (W) can be expressed as:

\[ W = -P \Delta V \]

Where:
- \( P \) is the pressure,
- \( \Delta V \) is the change in volume.

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