72
A 2.0g sample of steam at 100
C loses 1140 calories of heat. What is theresulting temperature of the sample?
Homework Answers
Given Q = 1140cal = 1140*4.18J = 4765Now Q = (2*10-3) L +msΔT4765=(2*10-3)[(2.26*106) + (4186) ( 100 - Tf)2382 *103=(2.26*106)+ (4186) ( 100)-4186 *TThe temp = 70.85
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A 0.750 L quantity of steam condensed on a surface (after boiling). a. Approximately how much heat has evolved? By using the change in enthalpy of vaporization is 40.7 kjmol^-1 for water at 100 C, 85.0 C as the temperature of the surface on which the steam condenses, and 4.21 J g^-1 C^-1 as the average specific heat of liquid water in the temperature ranges 85C to 100C. b. How much heat has evolved in this case? Show your work.
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FOOD ENG Q's
How many kg of steam will be necessary to heat 3532kg of milk from 20 C to 80 C if the steam is at 300Kpa and 100% quality and the condensate leaves at 100C? Cp of milk is 4.06 kJ/kgC. Assume milk has same density as water and heat from the steam goes to the milk
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In a thermally isolated enironment, you add ice at 0c and stearn at 100C (a) Determine the amount of steam condensed (in g) and the final temperature (in °C) when the mass of ice and steam added ere respectively 80.5 gand 11.2 g. amount of steam condensed 12 final temperature (b) Repeat this calculation, when the mass of ice and steam added are interchanged. (Enter the amou t of steam oondensed in g ard the final temperature in °C.) amount...
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