How many kilo calories (kcal) arerequired to change 1 kg of 100°C boilingwater to 100°C steam? The quantity of heat Q that changes the temperature AT of a mass m of asubstance is given by Q= cm AT, where c is the specific heat capacity ofthe substance (c = 1 cal/g°C = 4.2 J/g°C for water). The above only appliesif the substance is not changing phase however.During phase transitions the heat Q absorbed by a substance will go intochanging the phase of the substance (e.g melting or vaporizing) and not intochanging its temperature, thus during phase transitions the temperature ofthe substance will not change (see figure below). The quantity of heat Qthat changes the phase of a mass m is QmL, where L is the latentheat of fusion or vaporization of the substance. For water the heat of fusion80 cal/g = 335 J/g, and the heat of vaporization is Lvaporizationis L fusion540 cal/g = 2260 J100°-VaporizingIceMelting0°-80 cal ; 100 cal :-50°540 cal(335 J) (419 J)(2260 J)HeatTemperature in C°WaterSteam

Mass of water = 1 kg Temperature of water = 100°C Latent heat of vaporization (Lv) = 540 cal / g…

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How many kilo calories (kcal) are required to change 1 kg of 100°C boiling water to 100°C steam?

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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