Total enthalpy change for freezing of 1 mol of water at to ice at is } ____ [2025]

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Solution

Q.
Total enthalpy change for freezing of 1 mol of water at $10 ° C$ to ice at $- 10 ° C$ is ____

(Given: $Δ_{fus} H = x kJ/mol$

$C_{p} [H_{2} O (l)] = y {Jmol}^{- 1} K^{- 1}$

$C_{p} [H_{2} O (s)] = z {J mol}^{- 1} K^{- 1}$ ) [2025]

1 $- x - 10 y - 10 z$

2 $- 10 (100 x + y + z)$

3 $10 (100 x + y + z)$

4 $x - 10 y - 10 z$

Ans.
(2)

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