Question

(9%) Problem 11: Suppose you place 0.285 kg of 21.5°C water in a 0.55 kg aluminum pan with a temperature of 155°C, and 0.0075 kg of the water evaporates immediately, leaving the remainder to come to a common temperature with the pan. 0.20 Date: 131/2020 11:39:00 PM Substances Specific heat (c) Solids J/kg C kcal/kg. Aluminum 900 0.215 Concrete 840 Copper 387 0.0924 Granite 840 0.20 Ice (average) 2090 0.50 Liquids Water 4186 1.000 Gases Steam (100°C) 1520 (2020) 0.363(0.482) Otheexpertta.com A What would be the final temperature, in degrees Celsius, of the pan and water? The heat of vaporization of water is L = 2256 kJ/kg. You may neglect the effects of the surroundings and the heat required to raise the temperature of the vaporized water. Grade Summary To = 1 Deductions Potential 100% sino cos tano cotano asino acos atan) acotan sinh cosho tanh cotanh Degrees O Radians Submissions Attempts remaining (per attempt) detailed view 789 EAN 45 6 123 + 0 . VO Submit Hint 1 give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback O deduction per feedback

Answer 1

Sol. equal to from the heat lost given condition aluminium is hear by gained water by clt-155) mg2+ (0.285-ma) a Ew (t-21.5) -) - 0.55 X900 (t-155 0.0075 X 2 256000 + (0.285 0.0075) x4186 x(-21.5 -495t + 76 725 - 791911 tocb91 = TL° һLь ho . 2 84 779.72 1656, 6 t It=5log And I 51.2°C T -

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