A woman finds the front windshield of her car covered with iceat -11.2 °C. The i
ID: 1726022 • Letter: A
Question
A woman finds the front windshield of her car covered with iceat -11.2 °C. The ice has a thickness of 5.45 x 10-4m, and the windshield has an area of 1.29 m2. Thedensity of ice is 917 kg/m3. How much heat in joules isrequired to melt the ice?
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Chapter 12, Problem 57A woman finds the front windshield of her car covered with iceat -11.2 °C. The ice has a thickness of 5.45 x 10-4m, and the windshield has an area of 1.29 m2. Thedensity of ice is 917 kg/m3. How much heat in joules isrequired to melt the ice?
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No unitssmm^3m/skgNJWK The number of significant digits is set to 3; thetolerance is +/-2% Please Help Cannot figure this one out.Explanation / Answer
Given that the initial temperature of ice is Ti =-11.2oC Thickness of ice is t = 5.45*10-4 m Area is A = 1.29 m2 Density is = 917 kg/m3 ----------------------------------------------------- Then the mass of ice is m = *V = *A*t = -------- kg Heat required to melt ice is Q = heat required to change ice from-11.2oC to 0oC ice + Heat required to meltice at 0oC = m*Si*(11.2oC) + mLice = m*(2090 J/kg.K)*(11.2oC) + m(33.5*104 J/kg ) = ------------ J
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