Suppose you warm up 540 grams of water (about half a liter, or about a pint) on a stove, and while this is happening, you also stir the water with a beater, doing 2 x 104 J of work on the water. After the large-scale motion of the water has dissipated away, the temperature of the water is observed to have risen from 17°C to 76°C. Part 1 (a) What was the change in the thermal energy of the water? AEthermal = i Save for Later Attempts: 0 of 4 used Submit Answer Part 2 (b) Taking the water as the system, how much energy transfer due to a temperature difference (microscopic work) Q was there across the system boundary? Q = i Save for Later Attempts: 0 of 4 used Submit Answer Part 3 (c) Taking the water as the system, what was the energy change of the surroundings? AEsurroundings = i Save for Later Attempts: 0 of 4 used Submit Answer
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.
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