① When the temperature changes to △t during a certain process, it absorbs (or releases) heat. Q means heat (J)
Q=c·m·Δt．
Q suction = c·m·(t-t0)
Q release = c·m·(t0-t)
(t0 is the initial temperature; t is the final temperature)
Where C is the specific heat (capacity) related to this process.
The unit of heat is the same as the unit of work and energy. The unit of heat in the International System of Units is Joule (referred to as Joule, abbreviated as J) (established to commemorate the scientist Joule). Historically, the calorie unit was defined as calories (abbreviated as card, abbreviated as cal), and it was only used as an auxiliary unit of energy, 1 card = 4.184 tsu.
Note: 1 kcal = 1000 kcal = 1000 calories = 4184 joules = 4.184 kcal
The balanced relationship between the heat absorbed in a certain area and the heat released and stored in a certain period of time.
△T=（t1-t0）
② Calculation formula for heat released by the complete combustion of solid fuel: Q release = mq Calculation formula for heat released by the complete combustion of gas fuel: Q=Vq Q represents heat (J), q represents heat value (J/kg), m represents the mass of solid fuel (kg), and V represents the volume of gas fuel (m^3).
q=Q release/m (solid); q=Q release/v (gas)
W=Q release=qm=Q release/m W=Q release=qV=Q release/v (W: total power)
(The calorific value is related to the pressure)
SI system international units:
Q———The heat emitted after a certain fuel is completely burned——Joul J
m———represents the mass of a certain fuel——Kg kg
q———Denotes the calorific value of a certain fuel——Jola per kilogram J/kg
Thermal energy calculation formula
Q=△t*m*C
(The specific heat capacity is C, the mass is m, and Δt is the temperature difference)
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