Specific heat capacity of ammonium sulfate mother liquor

definition: Specific heat capacity, also known as specific heat, or specific heat capacity for short, is the heat capacity of a unit mass of material, that is, the internal energy absorbed or released when a unit mass of an object changes unit temperature. Usually represented by the symbol c. 　　The specific heat capacity of a substance is related to the process being carried out. Commonly used in engineering applications are constant pressure specific heat capacity CD, constant volume specific heat capacity Cp and saturated state specific heat capacity. Constant pressure specific heat capacity Cp is the energy absorbed or released by a unit mass of material when the temperature rises or falls by 1 degree Celsius or 1K under the condition that the specific pressure remains unchanged. ； The specific heat capacity at constant volume Cv is the internal energy absorbed or released when the temperature of a unit mass of a substance increases or decreases by 1 degree Celsius or 1K under the condition that the specific volume remains unchanged. The saturated specific heat capacity is the heat absorbed or released by a unit mass of a substance in a certain saturated state when the temperature increases or decreases by 1 degree Celsius or 1K. In the context of secondary schools, this is simply defined as: The heat absorbed when the temperature of a unit mass of a substance increases by 1°C (or the heat released when the temperature decreases by 1°C) is called the specific heat capacity of the substance. The unit is J/(kg·℃), which is read as J per kilogram in degrees Celsius. Related calculations: Suppose an object with mass m absorbs (or releases) heat ΔQ in a certain process, and the temperature increases (or decreases) ΔT, then ΔQ/ΔT is called the heat capacity of the object in this process (referred to as heat capacity), represented by C, that is, C=ΔQ/ΔT. Divide the heat capacity by the mass to get the specific heat capacity c=C/m=ΔQ/mΔT. For the heat capacity and specific heat capacity of small processes, C=dQ/dT, c=1/m respectively * dQ/dT. Therefore, in the finite process of the object temperature changing from T1 to T2, the heat absorbed (or released) Q=∫(T2,T1)CdT=m∫(T2,T1)CdT. 　　In general, heat capacity and specific heat capacity are both functions of temperature, but when the temperature change range is not too large, they can be approximately regarded as constants. So Q=C(T2-T1)=mc(T2-T1). If the temperature change amount ΔT=T2-T1, then Q=cmΔT. This is the basic formula used in middle school to calculate heat using specific heat capacity. 　　In English, specific heat capacity is known as: Special Heat Capacity (SHC). 　　The formula for calculating heat energy using specific heat capacity is: Energy=Mass×Specific Heat Capacity×Tempreture change can be abbreviated as: Energy=Mass×SHC×Temp Ch, Q=mcΔt. (T is divided into many types, such as Q is endothermic, T1-T2 ； If Q is exothermic, T2-T1). Specific heat capacity of the mixture: 　　c=ΣC/ΣM=(m1c1+m2c2+m3c3+…)/(m1+m2+m3+…). 　　Definition of specific heat capacity of gas: Cp specific heat capacity at constant pressure: The heat capacity when the pressure remains constant and the temperature changes with volume. 　　Cv specific heat capacity at constant volume: The heat capacity when the volume remains constant and the temperature changes with pressure. 　　Then when the gas temperature is T and the pressure is P, the specific heat capacity of the gas when heat dQ is provided is: 　　Cp * m * dT=Cv * m * dT+PdV ； 　　Among them, dT is the temperature change, and dV is the volume change. 　　Specific heat capacity of ideal gas: 　　For a gas with f degrees of freedom, the constant volume specific heat capacity and molar specific heat capacity are: 　　Cv,m=R * f/2 Cv=Rs * f/2 R=8.314J/(mol·K) For solids and liquids, the specific heat capacity can be measured by the specific constant pressure heat capacity Cp. 　　Right now: C=Cp (i.e. measure C=dQ/mdT using the defined method) Dulong-Petit rule: 　　The specific heat capacity of metals has a simple rule, that is, within a certain temperature range, all metals have a fixed molar heat capacity.: 　　Cp≈25J/(mol·K) Therefore, cp=25/M, where M is the molar mass and the specific heat capacity unit is J/(mol·K). 　　Note: The relationship no longer holds for temperatures well below 200K, because as T goes to 0, C will also go to 0. 　　Specific heat capacity of common gases (unit: J/(g * K)) Cp Cv Oxygen 0.909, 0.649 Hydrogen 14.05, 9.934 Water vapor 1.842, 1.381 Nitrogen 1.038, 0.741 Note: I don’t know if your question has been answered? This post was last edited by ryn on 2009-3-18 14:53 ]

Let me give you an example, you may understand it more clearly. example: In order to measure the temperature of the furnace fire, you can take a metal block, heat it in boiling water to 100℃, put it into a cup of water at 30℃, and measure the temperature after mixing is 32℃. Then heat the metal block in the furnace for a long enough time, take it out, and put in another cup of water with the same mass as the first time. After mixing, the water temperature rises from 30℃ to 50℃. Try to calculate the temperature of the furnace? Specific heat capacity is a physical quantity that reflects the endothermic (or exothermic) ability of a substance. It is an attribute of a substance. Any substance has its own specific heat capacity. Even the same substance has different specific heat capacities due to different physical states. Specific heat capacity is one of the important thermodynamic properties of a substance. In order to calculate the specific heat capacity during a certain measurement process or other The heat added or released during the process requires understanding of this property. The definition of specific heat capacity is: the heat required to raise a unit mass object by one degree. The principle of constant specific heat capacity is mainly used. Suppose the specific heat capacity of water is a and the specific heat capacity of the metal block is b. Because the mass of the metal and water has not changed twice, the mass can be ignored. Then for the first time, M metal * b * (100-32)=M water * a * (32-30) For the second time, assuming the temperature of the metal is X, then: 　M metal * b * (X-32)=M water * a * (50-30) Combining these two equations, we can obtain: X=712℃.

You can also refer to the method on the specific heat capacity of mixed solutions introduced in the "Petrochemical Design Manual"!