1 kilo calorie is equal to how much joules
Answers
1 kilocalorie =
4184 joules
Thermodynamically, calorie is defined as the amount of heat energy needed to raise the temperature of one gram of pure water by one degree Celsius.
1 Kilocalorie are 1000 calories, the amount of caloric energy needed to raise the mass of 1 kg of pure water by 1 ° C.
It can be shown that
1 joule (j) = 1W.s = 1kW / 1000. 1 hour / 3600 = 2.7 tenth of million of 1 kW / h
And also that
1 kilocalorie = 4184 j =4184. 2,7.10 ^-7 kW / h = 0.001162 kW / h
If we want to raise in 10 ° C to 100 kg of pure water in an adiabatic form (without loss of energy from the system or inputs from another heat source) we will need 1,162 kW / h
According to the MHO, an average of 2000 kilocalories per day is needed for a human being, equivalent to about 2.3 kW / h of daily energy.
A person walking normally dissipates an energy of about 0.250 kW / h
As a reference an electric toaster for two slices of bread consumes an energy of 0.8 kW / h
Note: Do not confuse power (kW) with energy (kW / h)