How to find the physical specific heat capacity, how to find the specific heat capacity?

q=mcδt。

The formula for calculating the heat related to specific heat is: Q = cmδt i.e. q absorption (discharge) = cm (t-t1) where c is the specific heat, m is the mass, t is the final temperature, t1 is the initial temperature, and q is the energy. When it is endothermic, it is Q=cmδt liter (the actual raised temperature is used to reduce the initial temperature of the object), and when it is exothermic, it is Q=cmδt (the actual initial temperature is used to reduce the temperature after the drop).

Or q=cmδt=cm (end of t - beginning of t), q>0 is endothermic and q<0 is exothermic.

When it comes to the change of state of matter, the calorific calculation cannot be directly used q=cmδt, because the specific heat capacity of different substances is generally different, and the specific heat capacity of the substance changes after the change of biological state. ）

If 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), which is represented by c, that is, c = δq δt. Divide the heat capacity by the mass, which gives 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, c=1 m*dq dt, respectively.

Therefore, in the finite process of the temperature change from t1 to t2, the heat absorbed (or released) q = (t2,t1)cdt = m (t2,t1)cdt.

q=cmδt

Q is the heat, C is the specific heat capacity, M is the mass, and ΔT is the temperature difference.

t =t2-t1

T2 is the final temperature, T1 is the initial temperature, and δT is the temperature at which the object rises or falls.

The formula for specific heat capacity is c=q mδt

In general, it directly tells you the specific heat capacity of an object, allowing you to calculate the heat it absorbs or emits q.

Specific heat capacity is a property of an object, and the method is similar to density.

q=cmδt

C is the specific heat capacity, M is the mass, and δT is the temperature difference.

It can also be divided into two writes:

When endothermic: q suction = cm (t-t0).

When exothermic: q emitting cm(t0-t).

Where: t is the final temperature, and t0 is the initial temperature.

q=cm△t

q suction = cm (t-t.) t refers to the final temperature, t. It refers to the initial temperature] q amp = cm (t. -t)

Correspondingly, the specific heat capacity is.

c=q suck m(t-t. )

c=q put m(t. -t)

Problem 1: How to calculate the specific heat capacity q=cmδt

So the specific heat capacity c=q mδt

It is the heat capacity of a unit mass of a substance, that is, the internal energy absorbed or released by a unit mass object when it changes its unit temperature. Specific heat capacity is a physical quantity that represents the thermal properties of a substance.

The unit in its International System of Units is joules per kilogram of Kelvin (j kg k or j kg, j refers to joules and k refers to thermodynamic Wendan, which is equal to degrees Celsius.

Question 2: How to calculate the specific heat capacity Specific heat capacity is a property of a substance

Although the formula q = cmδt can be used to calculate the specific heat of a substance, it cannot be considered that the specific heat of a substance is directly proportional to q and inversely proportional to m and δt. Because the specific heat is a property of the substance, it does not change with the change of external conditions, but is only related to the type of matter and the state of the substance, which can be used to identify the emptiness of the substance, the specific heat of different substances is different, and the specific heat of the same substance in the same state is the same. 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, when the state of matter changes, the specific heat will change accordingly

q suction = cm (t2-t1) = cm t

where c is the specific heat capacity, and the unit is j kg; m is the mass, and the unit is kg; T1 and T2 are the initial and end temperatures.

t=t2-t1, which is the temperature difference. For endothermy, it is the number of degrees that have been raised.

Note: Specific heat capacity, also known as specific heat capacity, referred to as specific heat, is the heat capacity of a unit mass of a substance, even if the internal energy absorbed or released by a unit mass object changes at a unit temperature. Specific heat capacity is a physical quantity that represents the thermal properties of a substance. It is usually denoted by the symbol c.

If you carefully study the definition of specific heat capacity, you will better understand the formula: q suction = cm t how to get it.

c=q/m·△t。

1. The concept of specific heat capacity.

The ratio of the heat absorbed by a certain mass of a substance at an elevated temperature to the product of its mass and elevated temperature is called the specific heat capacity of the substance.

The above inverse process is also valid. That is, the ratio of the heat emitted by a certain mass of a certain substance when the temperature is lowered to the product of its mass and the reduced temperature is called the specific heat capacity of the substance.

Definition of specific heat capacity: c=q (m t); In the above formula, q is the heat, c is the specific heat capacity, m is the mass of the object, and t is the temperature difference.

The specific heat capacity is measured in coules per kilogram of Celsius and the symbol is j (kg).

2. Derivation of the specific heat capacity formula.

Definition of specific heat capacity: c=q (m t); It can be deduced that m= q c t; q=cm△t =cm(t1-t0)。

Note: T1 is high temperature; t0 is low temperature.

t1= t0+q /cm；t0= t1-q /cm。

3. Experiment: compare the endothermic absorption of different substances.

Electric heaters, glasses, thermometers of the same specification. Heat water and cooking oil of the same quality so that both substances rise to the same temperature and compare how much heat they absorb.

Conclusion: Different substances absorb different amounts of heat when they have the same mass and the same elevated temperature.

Q Suction = C * M (T-T0) Heat Absorption = Specific Heat Capacity * Mass (Initial Temperature - Final Temperature) Q Thermal Matter Side Quantity Unit J

Specific heat in J (kg*).

m mass single cover leakage rubber bit kg

The unit of the end temperature to the initial temperature is the temperature at the beginning of the search, which is the initial temperature.

q=cm△t。1. Definition: The ratio of the heat absorbed (or released) by a certain mass of a substance when the temperature rises (or decreases) and the product of its mass and the temperature that rises (or decreases) is called the specific heat capacity of the substance.

The specific heat capacity is expressed in c in joules (kilograms Celsius) and symbol: j (kg·?).

c) Representation. 2. Characteristics (1) The specific heat capacity is a characteristic of the substance, each substance has its own specific heat capacity, and the specific heat capacity of different substances is generally different, and the substance can be roughly identified. (2) The specific heat capacity only depends on the substance itself and its state, and has nothing to do with the mass, temperature, and heat absorption and release. (3) The larger the specific heat capacity of a substance, the less likely its temperature is to change.

Specific heat capacity of water type celery: c water = ?c)。Physical significance: When the temperature of water with a mass of 1kg rises or decreases1, the heat absorbed or released is as follows.

c (specific heat capacity) = q (heat absorbed by the object) m (mass of the object) * t (elevated temperature) 1400j degrees.

j (A look at the small information in the physics book shows that this substance is mercury.)

q water = [c water * m water * (60-20) degrees].

4200jq water = q iron = 4200j

T1 furnace = 4200J

913 degrees. At first, I thought that 913 degrees seemed too high, but I went to check the book and found that the melting point of iron was 1533 degrees, and it was 620 degrees different

In fact, if you don't understand, you have to ask, there is nothing to be shy about answering.