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What is the change in entropy when 2.5 mole of
P water is heated from \( 27^{\circ} \mathrm{C} \) to \( 87^{\circ} \mathrm{C} \) ? Assume

W that the heat capacity is constant.
\[
\left(C_{p, m}\left(H_{2} \mathrm{O}\right)=4.2 \mathrm{~J} / \mathrm{g}-\mathrm{K} \ln (1.2)=0.18\right)
\]
(1) \( 16.6 \mathrm{~J} / \mathrm{K} \)
(2) \( 9 \mathrm{~J} / \mathrm{K} \)
(3) \( 34.02 \mathrm{~J} / \mathrm{K} \)
(4) \( 1.89 \mathrm{~J} / \mathrm{K} \)
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