In attempt to determine the temperature of his campfire, a teacher removes 15 g aluminium pop can (caluminium = 900 J/kg·°C) that has been sitting in the coals from the fire and places it into a bucket that contains 2.0 L of water (cwater = 4 200 J/kg·°C) at 18 °C; 2.0 L of water has a mass of 2.0 kg. If the final temperate of the water, with the can in it, is 19 °C, what was the temperature of the aluminium can when it was in the fire?