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Using a condenser coil \( 10 \mathrm{~kg} \) of water is to be heated from \( 20^{\circ} \mathrm{C} \) to \( 80^{\circ} \mathrm{C} \) per hour. For the purpose, steam at \( 150^{\circ} \mathrm{C} \) is passed from the condenser which is immersed in water and steam condenses in the coil and comes out at \( 90^{\circ} \mathrm{C} \). Find the amount of steam required per hour for this purpose. Given that specific heat of water is \( 4200 \mathrm{~J} / \mathrm{kg}^{\circ} \mathrm{C} \) and latent heat of steam is \( 2.25 \times 10^{6} \mathrm{~J} / \mathrm{kg} \)
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