When you go out to your car one cold winter morning youdiscover a 0.52 cm thick

Question

When you go out to your car one cold winter morning youdiscover a 0.52 cm thick layer of ice onthe windshield, which has an area of 1.6 m2. If thetemperature of the ice is -8.2°C, andits density is 917 kg/m3, find the heat required to meltall the ice. Express your answer with three significant digits.

_____? MJ When you go out to your car one cold winter morning youdiscover a 0.52 cm thick layer of ice onthe windshield, which has an area of 1.6 m2. If thetemperature of the ice is -8.2°C, andits density is 917 kg/m3, find the heat required to meltall the ice. Express your answer with three significant digits.

_____? MJ

Explanation / Answer

to melt the ice need to be at 00C T = 0-(-8.2) = 8.2 0C mass m = 0.52*10-3 m*1.6m2*916kg/m2 = 0.762112kg=762.112g the specif heat c = 2.06J/g 0C the heat is: Q = mcT=762.112g*2.06J/g 0C *8.20C = 12873.60J = 12.9 mJ .

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