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Why can heat storage bricks absorb more heat?

2019-11-13
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What is the specific heat capacity of the heat storage brick? Fused magnesia brick

What is the specific heat capacity of the heat storage brick? Specific heat capacity is the amount of heat absorbed or released by a unit mass object when it changes its unit temperature. This is an explanation of Baidu Encyclopedia, but how to popularize it, for example, if you raise the heat once, and one egg is another heat. Specific heat capacity is used to materialize these. The specific heat capacity is referred to as specific heat, which is represented by C. Q means heat, specific heat is hot, and can be simply understood as "comparative heat".

Completely speaking, different substances with the same mass increase at the same temperature, who absorb more heat, whose specific heat is larger, 1 kg water temperature rises 1 degree Celsius absorbs heat 4200 joules, 1 kg copper temperature rises 1 degree Celsius absorbs heat 390 joules, obviously, the specific heat of water is larger than that of copper. On the contrary, it can compare which kind of heat is released when the heat is released.

What is the specific heat capacity of the heat storage brick?



Specific heat is a characteristic or property of a substance as well as density, hardness, color, etc., which is inherent to matter.

Although the formula C = Q / m Δt can be used to calculate the specific heat of a substance, it cannot be considered that the specific heat of a substance is proportional to Q and inversely proportional to m and Δt. Because specific heat is a property of matter, it does not change with external conditions. The change is only related to the type of matter and the state of the substance. It can be used to identify substances. Most of the substances have different specific heat capacities, except for a small part. For example, the specific heat capacity of kerosene and ice is the same. The same substance is the same as heat in the same state. The specific heat has nothing to do with the mass of the object, the amount of temperature change, and the amount of heat absorption (or heat release). However, the material will change more than the heat when the state changes

There is an object of mass m, and when the heat ΔQ is absorbed (or released) in a certain process, the temperature rises (or decreases) ΔT, then ΔQ/ΔT is called the heat capacity of the object in the process (referred to as heat capacity). Expressed by C, ie C = ΔQ / ΔT. Dividing the heat capacity by the mass, that is, the specific heat capacity c=C/m=ΔQ/mΔT. For the heat capacity and specific heat capacity of the micro process, there are C=dQ/dT and c=1/m*dQ/dT, respectively. Therefore, in the finite process in which the temperature of the object changes from T1 to T2, the heat absorbed (or released) Q = ∫ (T2, T1) CdT = m ∫ (T2, T1) CdT.


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