A tank containing 20 kg of water at 20oC is fitted with a stirrer (hat delivers work

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A tank containing 20 kg of water at 20oC is fitted with a stirrer (hat delivers work to the water at the rate of 0.25 kW. How long does it take for the temperature of the water to rise to 30oC if no beat is lost from the water? For water, CP = 4.18 kJ kg-1 C-1.
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Introduction to Chemical Engineering Thermodynamics

ISBN: 978-0071247085

7th edition

Authors: J. M. Smith, H. C. Van Ness, M. M. Abbott

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