Answer to Question #170249 in General Chemistry for ALMOND

Question #170249

When 165 mL of water at 22 degrees Celsius is mixed with 85 mL of water at 82 degrees Celsius, what is the final temperature? Assume that no heat is lost to the surroundings, and the specific heat of water is at 4.184 J/g C. The density of water is 1.00 g/mL.


1
Expert's answer
2021-03-09T07:45:56-0500

Solution:

 q=mc∆t

 For water q1 = q2

 m1c∆t1 = m2c∆t2

If the density of water is 1.00 g/mL then m1 = 165 g and m2 = 85 g 

 165 × (tf - 22) = 85 × (82 - tf)

 tf = 42.4 degrees Celsius


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