A Styrofoam Cooler Has a Surface Area of 2,700 Cm²

question 76

Multiple Choice

A Styrofoam cooler has a surface area of 2,700 cm² and a wall thickness of 3.0 cm. Styrofoam has a thermal conductivity of 0.010 W/m °C. A 2.0 kg block of ice is placed inside the cooler that has a temperature inside of 2.0 °C. If the heat of fusion for ice is 333.7 kJ/kg and the temperature outside is 35.0 °C, then how long will the ice last? Ignore the effect of the air inside the cooler.

• A) 74 hours
• B) 62 hours
• C) 55 hours
• D) 42 hours
• E) 24 hours

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