An electric heater transfers 9.20 ✕ 105 J into a block of ice with a mass of 2.35 kg and an initial temperature of 0°C. (a) How much of the energy (in J) supplied by the heater goes into melting all the ice into liquid water? (Enter your answer to at least three significant figures.) Review the definition of latent heat of fusion. How is the energy related to the mass and latent heat? J (b) How much of the energy (in J) supplied by the heater goes into raising the temperature of the liquid water? (Enter your answer to at least three significant figures.) Think about conservation of energy. The total energy supplied is known, and you found in part (a) the energy that goes into melting. How much is left over? J (c) What is the final temperature of the liquid water in degrees Celsius? °C
Latent heat and phase change
A physical process in which a conversion among the basic states or phases of matter, i.e., solid, liquid, and gas takes place under the effect of a certain temperature and pressure is referred to as a phase change. Generally, the phase change of a substance occurs when heat transfer takes place between the substance and its surroundings. Based on the direction in which heat transfer takes place, different types of phase changes can occur.
Triple Point of Water
The branch of physics in which observer deals with temperature related properties is called thermodynamics.
Boiling Point of Water
Everyday examples of boiling is, boiling milk, heating water. One would have observed that when we heat water it goes through various stages and at one point bubbles show in water, and water keeps splashing with bubbles bursting, we in layman terms say that water is boiling.
Freezing Point of Water
In general, the freezing point of water is 0° Celsius, or 32° Fahrenheit. This is the temperature at which water will ordinarily change from its liquid state to its solid state (ice). However, there are certain conditions that can affect the freezing point of water. For example, a liquid may be supercooled or contain impurities so that it does not freeze at the ordinary freezing point.
Review the definition of latent heat of fusion. How is the energy related to the mass and latent heat? J
Think about conservation of energy. The total energy supplied is known, and you found in part (a) the energy that goes into melting. How much is left over? J
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