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Aniline is a liquid which does not mix with water. When a small quantity of it is poured into a beaker of water at \( 20^{\circ} \mathrm{C} \), it sinks to the bottom. The densities of aniline and water at \( 20^{\circ} \mathrm{C} \) are \( 1021 \mathrm{~kg} \mathrm{~m}^{-3} \) and \( 998 \mathrm{~kg} \mathrm{~m}^{-3} \) respectively. Find the minimum temperature to which the mixture is to be heated so that aniline will form a globule and just starts floating. \( \gamma_{\text {aniline }}=85 \times 10^{-5{ }^{\circ} \mathrm{C}^{-1} ;} \gamma_{\text {water }}=45 \times 10^{-5}{ }^{\circ} \mathrm{C}^{-1} \).
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