① After a certain process, the temperature changes to △t, and it absorbs (or releases) heat. Q represents heat (J)
Q=c·m·Δt．
Q suction=c·m·（t－t0）
Q put=c·m·（t0－t）
(t0 is the initial temperature; t is the final temperature)
where C is the specific heat (capacity) associated with this process.
The units of heat are the same as those of work and energy. The unit of heat in the International System of Units is Joule (abbreviated as Joule, abbreviated as J) (erected in memory of the scientist Joule). Historically, the unit of heat has been defined as calorie (abbreviated as cal), which is only used as an auxiliary unit of energy, 1 calorie = 4.184 joules.
Note: 1 kcal = 1000 calories = 1000 calories = 4184 joules = 4.184 kilojoules
The balanced relationship between the heat absorbed and the heat released and stored in a certain area within a certain period of time.
△T=（t1-t0）
②The calculation formula for the heat released by the complete combustion of solid fuel: Q = mq The calculation formula for the heat released by the complete combustion of gas fuel: Q = Vq Q represents the heat (J), q represents the calorific value (J/kg), and m represents the solid The mass of fuel (kg), V represents the volume of gaseous fuel (m^3).
q=Q release/m (solid); q=Q release/v (gas)
W=Q discharge=qm=Q discharge/m W=Q discharge=qV=Q discharge/v (W: total power)
(Calorific value is related to pressure)
SI international units:
Q————The heat released after complete combustion of a certain fuel——Joule J
m————indicates the mass of a certain fuel——kilogram kg
q——indicates the calorific value of a certain fuel——Joules per kilogram J/kg
Thermal energy calculation formula
Q=△t*m*C
(Specific heat capacity is C, mass is m, Δt is the temperature difference)