A polystyrene box used to transport a donated heart has a total surface area of 0,1 m² and a wall thickness of 20 mm. How long will 1.5 kg of ice, initially at 0 °C, keep the inside temperature of the box at 0 °C if the outside temperature is 30 °C ? Use L; = 3,33.105 J.kg ¹ kp = 0,033 J.kg. °C-1 About 12 hours About 28 hours About a week About 2 days About 6 h