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In which of the following changes at con...

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)):}`

Text Solution

AI Generated Solution

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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O_(3)(g)+I^(-)(aq)+H_(2)O(l) to

Predict the sign of DeltaS (positive or negative) for the following changes : (i) HCOOH(l) to H_(2)O(l) + CO_(2)(g) (ii) NH_(3)(g) + HCI(g) to NH_(4)CI(s) (iii) I_(2)(s) to I_(2)(g) (iv) 2O_(3)(g) to 3O_(2)(g) (v) 2H_(2)(g) + O_(2)(g) to 2 H_(2)O(l) .

Knowledge Check

  • Determine which of the following reactions at constant pressure represent surrounding that do work on the system environment : (P) 4NH_(3)(g) + 7O_(2)(g) to 4 NO_(2)+ 6H_(2)O(g) (Q) CO.O(g)+ 2H_(2)(g) to CH_(3)OH(l) (R) C("s,graphite")+H_(2)O(g) to CO(g)+H_(2)(g) (S) H_(2)O(s) to H_(2)O(l)

    A
    R,S
    B
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    C
    Q,S
    D
    P,Q and S

  • Determine which of the following reactions at constant pressure represents surroundings that do work on the system: I. 4NH_(3)(g)+7O_(2)(g)rarr4NO_(2)(g)+6H_(2)O(g) II. CO(g)+2H_(2)(g)rarrCH_(3)OH(l) III. C(s,"graphite")+H_(2)O(g)rarrCO(g)+H_(2)(g) IV. H_(2)OrarrH_(2)O(l)

    A
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    B
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  • For the process, H_(2)O(l) to H_(2)O(g)

    A
    `DeltaS_(system) gt 0 and DeltaS_("surrounding")gt0`
    B
    `DeltaS_(system) gt 0 and DeltaS_("surrounding")lt0`
    C
    `DeltaS_(system) lt 0 and DeltaS_("surrounding")lt0`
    D
    `DeltaS_(system) lt 0 and DeltaS_("surrounding")lt0`

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