02/4/2018 11:59 PM O 48.6/682/3/2018 08:15 PM Gradebook CalculatorPeriodic Table
ID: 701216 • Letter: 0
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02/4/2018 11:59 PM O 48.6/682/3/2018 08:15 PM Gradebook CalculatorPeriodic Table Question 5 of 14 Map Sapling Learning macmillan learning To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 1 1.8 g, and its initial temperature is-14.8 The water resulting from the melted ice reaches the temperature of your skin, 31.2 °C. How much heat is absorbed by the ice cube and resulting water? Assume that all the water remains in your hand. Constants may be found here. Number Previous Give Up & View Solution e Check Answer Next Exit HintExplanation / Answer
Ans 1
Heat absorbed by ice cube to melt into water
= heat absorbed byvsensible heat + heat absorbed by latent heat
= m x Cp x (T2-T1) + m x H fusion
= 11.8 g x 2.11 J/gC x (0 + 14.8)C + 11.8 g x 334 J/g
= 368.4904 + 3941.2
Q1 = 4309.6904 J
Heat absorbed by liquid water to reach the equilibrium temperature of 31.2 °C
Q2 = m x Cp x (T2-T1)
= 11.8 g x 4.184 J/gC x (31.2 - 0)
= 1540.3814 J
Total heat absorbed = 4309.6904 + 1540.3814
= 5850.07 J
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