1. A brass of 1 kg mass has an initial temperature of 88 ◦C and is submerged in 0.44 kg of water at 6 ◦C. The final temperature is 20 ◦C. Find the specific heat capacity of the brass. ANSWER: 380.47J/kgoC
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.
1. A brass of 1 kg mass has an initial temperature of 88 ◦C and is
submerged in 0.44 kg of water at 6 ◦C. The final temperature is 20
◦C. Find the specific heat capacity of the brass.
ANSWER: 380.47J/kgoC
2. Determine the final temperature of coffee if a 125 g Pyrex glass mug
with an initial temperature of 20 ◦C is filled with 200 g of coffee at
90 ◦C assuming that all heat lost by the coffee is transferred to the
mug
ANSWER 87.2oC
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