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-iii! 21% (a Fri 11:14 AM Q E Firefox File Edit View History Bookmarks Tools Windo Help O O O C Mastering Physics: Bonus x Physics question I Chegg X a https Session masteringphysics.com /myct emView?off se next&assig; C a Search Most Visited Physics 2750 Spring 2016 (University Physics signed in as Juwan Mahaney Help close Bookmarks Help Sign Out Bonus Homework Short Answer Question 17.2 previous l 22 of 28 l next Bookmarks Bookmarks Unsorted Be Short Answer Question 17.2 myZou: P Sig Bb Login Part A N Netflix How many grams of ice at -24°C must be added to 211 grams of water that is initially at a temperature of 89°C to produce water at a final temperature of 9°C? All-N Assume that no heat is lost to the surroundings and that the container has negligible mass. The specific heat of liquid water is 4190 J/kg C and of ice is 2000 JVkg J/kg. normal point is 100 C and the h of vaporization is 2.256 x OC. Forwater the normal melting point is 0°C and the heat of fusion is 334 it x 103 The boiling files posted 06 J/kg Login Express your answer using two significant figures. Pocket: Subm My Answers Give Up Grade Continue Provide Feedback 29

Explanation / Answer

let the mass of ice used is m

mass of water , m1 = 211 gm

T1 = 89 degree C

T2 = 9 degree C

heat lost by water = heat gain by ice

211 * 4.186 * (89 - 9) = m1 * (2.0 * 24+ 334 + 4.186 * 9)

solving for m1

m1 = 168.4 gm

the mass of ice at -24 degree C needed is 168.4 gm

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