① After a certain process temperature change is △t, it absorbs (or releases) heat. Q for heat (J)
Q=c·m·Δt．
Q suction = c · m ·(t-t0)
Q放 = 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 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 (abbreviated as J)(in honor of the scientist Joule). Historically, the unit of heat was defined as calories (abbreviated as calories, abbreviated as cal), which was only used as an auxiliary unit of energy, with 1 calorie = 4.184 joules.
Note: 1 kcal = 1000 cal = 1000 calories = 4184 joules = 4.184 KJ
The equilibrium relationship between the heat absorbed by an area and the heat released and stored in a certain period of time.
△T=（t1-t0）
② Calculation formula of heat released by complete combustion of solid fuel: Q = mq Calculation formula of heat released by complete combustion of gaseous fuel: Q = Vq Q means heat (J),q means calorific value (J/kg),m means mass of solid fuel (kg),V means volume of gaseous fuel (m 3).
q = Q/m (solid);q = Q/v (gas)
W = Q discharge = qm = Q discharge/m W = Q discharge = qV = Q discharge/v (W: total work)
(Calorific value is related to pressure)
SI International Units:
Q --- the heat released after the complete combustion of a certain fuel --- Joule J
M --- indicates the mass of a certain fuel --- kg
q --- represents the calorific value of a fuel --- joules per kg J/kg
thermal energy calculation formula
Q=△t*m*C
(specific heat capacity is c, mass is m, Δt is temperature difference)
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