What does the specific heat capacity have to do with the object?

The specific heat capacity of an object is related to the processes carried out by the object. There are three common reaction processes: constant pressure, constant volume, and saturation state.

The specific heat capacity cp of a constant pressure is the energy absorbed or released by a unit mass of a substance when the temperature rises or falls by 1 or 1 k under the condition of constant pressure.

The specific heat capacity (CV) is the energy absorbed or emitted by a unit mass of a substance as the temperature rises or falls by 1 or 1 K under the condition that the volume (volume) remains unchanged.

The specific heat capacity in the saturated state is the amount of heat absorbed or emitted by a unit mass of a substance when the temperature rises or falls by 1 or 1 k in a certain saturated state.

Different substances have different specific heat, and specific heat is a property of matter, so it is possible to identify (roughly) different substances by difference in specific heat (note that some substances are quite close to specific heat).

The specific heat of the same substance generally does not change with changes in mass and shape. For example, a glass of water and a bucket of water have the same specific heat.

For the same substance, the specific calorific value is related to the state of matter, and the specific heat of the same substance in the same state is certain (ignoring the influence of temperature versus heat), but the specific heat is not the same in different states. For example, the specific heat of water is different from the specific heat of ice.

There is also a small change in specific heat capacity when the temperature changes, but it is generally negligible. The specific heat values given in the specific heat capacity table are the average values of these substances at room temperature.

The specific heat capacity of the gas is closely related to the thermal expansion of the gas, which is different when the volume is constant and the pressure is constant, so there are two concepts: the specific heat capacity of the constant volume and the specific heat capacity of the constant pressure. However, in the case of solids and liquids, the difference between the two is so small that they are generally no longer distinguished.

The specific heat capacity is related to the state and type of object.

Specific heat capacity is a property of the substance itself, and it is only related to the type and state of the substance

Specific heat capacity. It refers to the amount of heat required to increase the temperature of 1kg of homogeneous substances by 1k in the absence of phase change or chemical change. Using the concept of specific heat capacity, it is possible to deduce a molar heat capacity that represents the amount of heat required to raise 1 k of a mol of substance.

And the molar heat capacity cp under isobaric conditions is called constant pressure molar heat capacity. The molar heat capacity CV under isochoric conditions is called the constant volume molar heat capacity. The relationship between the constant pressure molar heat capacity and temperature is usually correlated as a polynomial.

The mass possessed by a substance per unit of substance is called molar mass.

molarmass), denoted by the symbol m. When the amount of a substance is in mol, the unit of molar mass is g mol, which is numerically equal to the relative atomic mass of the substance.

or relative molecular mass. For a compound, its molar mass is fixed. The mass of a substance changes with the amount of matter.

Indicates the ability of the object to absorb heat or dissipate heat, and the larger the specific heat capacity, the stronger the body's ability to absorb heat or dissipate heat.

It refers to the amount of heat absorbed or emitted by a unit temperature of a certain substance per unit mass as it rises or falls. its International System of Units.

The unit in is joules.

per kilogram of Kelvin.

j ( kg · k )] is the amount of energy required to raise the temperature of 1 kilogram of matter by 1 Kelvin.

The greater the specific heat capacity of a substance, the more heat energy is required for the same mass and temperature rise. For example, the specific heat capacities of water and oil are about 4200 jkg-1k-1 and 2000 jkg-1k-1, respectively, that is, the heat energy of heating the same mass of water is about twice as much as that of oil. If the same mass of water and oil are heated separately with the same heat energy, the temperature rise of the oil will be greater than that of water.

Carnot's theorem states that the efficiency of reversible circulation is only related to the temperature of the high-temperature heat source and the low-temperature heat source, and has nothing to do with other factors such as the working substance (working fluid) or the working path.

Thermodynamic temperature.

Also known as absolute temperature.

It is one of the important parameters in thermodynamics and statistical physics. Absolute zero, commonly referred to as absolute zero.

It corresponds to Celsius.

In the International System of Units, the specific heat capacity is measured in "joules per kilogram of Kelvin". It can also be read as joules per kilogram of kelvin, joules per kilogram of kelvin, joules per kilogram of kelvin, etc. Writing j ( kg · k ).

Joules per kilogram of Celsius [j ( kg · is numerically equivalent to joules per kilogram of Kelvin.

Specific heat capacity calculation.

If an object with mass m absorbs (or emits out) heat δh in a certain process, and the temperature rises (or decreases) δt, then δh δt is called the heat capacity of the object in this process.

Referred to as heat capacity), denoted by c, i.e. c = δh δt. Divide the heat capacity by the mass to obtain the specific heat capacity c

c/m=δh/mδt。

For the heat capacity and specific heat capacity of the micro process, there are c=dh dt, c=1 m*dh dt, respectively. Therefore, in the finite process of the temperature change from t1 to t2, the heat absorbed (or released) h= (t2,t1)cdt=m (t2,t1)cdt. In general, the heat capacity and specific heat capacity are both functions of temperature, but when the temperature variation range is not too large, the approximate value can be regarded as a constant.

This results in the formula h=c (t2-t1)=mc (t2-t1). If the temperature change is δt=t2-t1, then there is h=cmδt. This is the basic formula for calculating heat in terms of specific heat capacity.

<> specific heat capacity, represented by the symbol C, is also known as specific heat capacity, referred to as specific heat, is the heat capacity of a unit mass substance, that is, the heat absorbed or released by a unit mass object when it changes the unit temperature.

Discipline definition: the ratio of the heat absorbed by a certain mass of a substance to the product of the mass of the substance and the elevated temperature when the temperature rises, which is called the specific heat capacity (specific heat) of the substance, which is represented by the symbol c. The unit in the International System of Units is joules per kilogram Kelvin [j (kg·k)] or joules per kilogram per degree Celsius [j (kg·) j is for joules and k is for the thermodynamic temperature scale, which is the amount of energy required to raise (or fall) the temperature of 1 kilogram of a substance by 1 Kelvin.

Based on this theorem, the following formula can be derived:

q is the heat absorbed (or released); m is the mass of the object, δt is the temperature rise (or fall) value after heat absorption (or exothermy), the junior high school textbook writes δt as δt, in fact, this is not standardized (we often use it as a unit of temperature in our lives, rarely use k, and δt = δt, so δt is used in middle school, but δt is still used in the international or higher field of science in Xiaoxiang).

The specific heat capacity of a substance is related to the process undertaken. There are three commonly used in engineering applications: constant pressure specific heat capacity CP, constant volume specific heat capacity CV and saturated state specific heat capacity.

The specific heat capacity cp of a constant pressure is the energy absorbed or released by a unit mass of a substance when the temperature rises or falls by 1 or 1 k under the condition of constant pressure.

The specific heat capacity (CV) is the energy absorbed or emitted by a unit mass of a substance as the temperature rises or falls by 1 or 1 K under the condition that the volume (volume) remains unchanged.

Specific heat capacity in saturated state: It is the heat absorbed or released by a unit mass of a substance when the temperature rises or falls by 1 or 1k in a saturated state.

Characteristic. Specific heat capacity, referred to as specific heat, is a physical quantity commonly used in thermodynamics, indicating the ability of an object to absorb heat or dissipate heat. The specific heat capacity unit is a composite unit.

The unit of heat is joules and the unit of temperature is Kelvin. Water has a large specific heat capacity and has a wide range of applications in daily life, such as coolant or heating.

The concept of specific heat capacitySpecific heat capacity refers to the amount of heat required to increase the temperature of a certain amount of homogeneous substance by 1k in the absence of phase change and chemical change.

If it is a 1mol substance, the required heat is the molar heat capacity. The molar heat capacity cp under isobaric conditions is called the constant pressure molar heat capacity. The molar heat capacity CV under isochoric conditions is called the constant volume molar heat capacity.

The relationship between the constant pressure molar heat capacity and temperature is usually correlated as a polynomial.

Specific heat capacity of common substancesThe specific heat capacity of copper is.

The specific heat capacity of iron is.

The specific heat capacity of aluminum is.

The specific heat capacity of water is.

The specific heat capacity of air is.

The specific heat capacity of mercury is.

The specific heat capacity of alcohol is.

The specific heat capacity of kerosene is.

The specific heat capacity of castor oil is.

The specific heat capacity of sand and gravel is.

The specific heat capacity of dry cement is.

The specific heat capacity of ice is.

The specific heat capacity of lead is.

Specific heat capacity refers to the amount of heat required to increase the temperature of 1kg of homogeneous substance by 1k in the absence of phase change and chemical change. I've compiled some knowledge points about specific heat capacity.

Specific heat capacity is the amount of heat required per unit mass of a substance to raise the unit temperature. The unit in the International System of Units is joules per kilogram of Celsius (j (kg·k) or j (kg·) j is for joules and k is for the thermodynamic temperature scale, which is equal to degrees Celsius, i.e. the energy required to raise (or fall) the temperature of 1 kilogram of a substance by 1 degree Celsius.

1. Specific heat capacity is a property of a substance

a. Specific heat capacity is a reflection of different substances of equal mass, when the temperature rises (or decreases) by the same degree, the heat absorbed (or released) is a different physical quantity.

b. The specific heat capacity of different substances is generally different.

2. Specific heat capacity is also a property of matter

a. The specific heat capacity does not change with the mass of the object.

b. The specific heat capacity has nothing to do with temperature and temperature changes.

c. The specific heat capacity has nothing to do with the amount of heat absorbed or released by the substance.

3. The specific heat capacity is related to the state: the state changes, the specific heat capacity changes.

4. Specific heat capacity is a physical quantity that reflects the heat absorption or heat release capacity of a substance: under the same heating or cooling situation, the temperature change of a substance with a large specific heat capacity is small, and the temperature change of a substance with a small specific heat capacity is large.

It was originally in the 18th century that the Scottish physicist and chemist JBlake discovered that different substances with the same mass require different amounts of heat to rise to the same temperature, and proposed the concept of specific heat capacity. Specific heat capacity can be measured for almost any substance, such as chemical elements, compounds, alloys, solutions, and composite materials.

Historically, heat has been defined by the specific heat of water, and the amount of calories required to raise 1 degree of water by 1 gram of water has been defined as 1 calorie.

The above is the knowledge points of specific heat capacity that I have compiled, I hope it can help you.