The normal boiling point of water is \( 373 \mathrm{~K} \). Vapour pressure of water at temperat...

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The normal boiling point of water is \( 373 \mathrm{~K} \). Vapour pressure of water at temperature \( T \) is 19 \( \mathrm{mm} \mathrm{Hg} \). If enthalpy of vaporisation is \( 40.67 \mathrm{~kJ} / \mathrm{mol} \), then temperature \( T \) would be (Use : \( \log 2=0.3, R: 8.3 \mathrm{JK}^{-1} \mathrm{~mol}^{-1} \) ):
(a) \( 250 \mathrm{~K} \)
(b) \( 291.4 \mathrm{~K} \)
(c) \( 230 \mathrm{~K} \)
(d) \( 290 \mathrm{~K} \)
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