The juice is frozen at 0 degrees Celsius and I assume that it will become gas at 100 degrees Celsius. So we change the form of the water from solid to liquid, then to gas. That means we have to find out how much heat needed to change water form too, not only the heat needed to increase its temperature.
The latent heat of water is 4.2J/g °C while the heat of fusion is 334 J/g and the heat of vaporization is 2260 J/g. The energy needed will be:
The littoral zone of a lake is the area closest to the shore. It has very little biological activity but includes a lot of oxygen. The water in the lake's littoral zone is freshwater, free of living organisms such as plants and fish.
To convert 78.1 g of water at 0° C to Ice at -57.1°C; we can do it in steps; 1. Water at 0°C to ice at 0°C The heat of fusion of ice is 334 J/g; Heat = 78.1 × 334 = 26085.4 Joules 2. Ice at 0°C to -57.1°C Specific heat of ice is 2.108 J/g Heat = 78.1 × 2.108 J/g = 164.6348 Joules Thus the total heat energy released will be; 26085.4 + 164.6348 = 26250.0348 J or 26.250 kJ
