A 0.685 kg sample is placed in a cooling apparatus that removes energy as heat at a constant rate. The figure gives the temperature T of the sample versus time t; the horizontal scale is set by ts = 132.0 min. The sample freezes during the energy removal. The specific heat of the sample in its initial liquid phase is 3011 J/kg-K. What are (a) the sample's heat of fusion and (b) its specific heat in the frozen phase? 280 T (K) 260 250 t (min) ts

A 0.685 kg sample is placed in a cooling apparatus that removes energy as heat at a constant rate. The figure gives the temperature T of the sample versus time t; the horizontal scale is set by ts = 132.0 min. The sample freezes during the energy removal. The specific heat of the sample in its initial liquid phase is 3011 J/kg-K. What are (a) the sample's heat of fusion and (b) its specific heat in the frozen phase? 280 T (K) 260 250 t (min) ts

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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In an experiment measuring the latent heat of fusion of water, the following procedure was followed. Ice cube of mass 35.0 g at an initial temperature of 0.0°C is dropped into 225.0 g of 65.0°C water in an aluminum container. The mass of the aluminum container is 44 .0 g and the final equilibrium temperature is 46.0℃. Determine whether any heat is lost or gained in this experiment to the environment. If yes, how much? (For water: c = 1.00 cal/g×°C and Lf = 77.9 cal/g; for Al: c = 0.215 cal/g×°C
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2.4 g of water was evaporated from the surface of skin. How much heat, in the unit of kJ, was transferred from the body to the water to evaporate the water completely? The temperature of the skin is 33.5°C, and the latent heat of vaporization of water at 33.5°C is 43.6 kJ/mol. Molar mass of water is 18 g/mol
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