They are both an measure of chemical energy
However,
Calorie is an old-fashioned Imperial system of enertgy measure
Joules in the modern S.I. system of energy measure.
The converskion factor between them is 1 cal = 4.184 J
First scientists used calorie as the unit of heat energy. One calorie is the amount of heat required to raise the temperature of one gram of water through one degree celcius. So 1000 cal is taken as kilo calorie. Even now a days we use such units in case of biological energy. Later scientists have found that heat is also a kind of energy which is closely related to mechanical energy as 1 cal = 4.18 joule So k cal requires 4180 joule of energy. This is what we call mechanical equivalent of heat energy. So at present stage we use only joule as the unit of heat energy. Especially in chemistry they use kilojoule/mole etc.
The small calorie, symbol cal (note the lower case c) is the energy required to raise the temperature of 1 gram of water by 1 degree Celsius at 1 atmosphere of pressure. The small calorie is a pre SI metric unit of energy. In SI terms it is equivalent to about 4.2 Joules of energy. The small calorie is also called the gram calorie. If the subject is physics, calorie refers to the gram calorie, the small calorie.The large Calorie (note the upper case C) is the energy required to raise the temperature of 1 kilogram of water by 1 degree Celsius at one atmosphere of pressure. When the subject is diet, such as food nutritional data, Calorie always means the large Calorie, the kilogram Calorie.The existence of these two different but related units with the same name is confusing and is an invitation to error. This is unfortunate, but the kilo Calorie is deeply embedded in nutritional literature, and the gram Calorie is embedded in early physics literature, so we are stuck with this situation.If you are doing physics, try to stay with SI units.1 joule is needed to raise the temperature of one gram of water by one degree Celcius.
The Joule-Thomson effect is calculated in thermodynamics by using the Joule-Thomson coefficient, which is the rate of change of temperature with pressure at constant enthalpy. This coefficient is determined by taking the partial derivative of temperature with respect to pressure at constant enthalpy. The formula for the Joule-Thomson coefficient is given by (T/P)H, where is the Joule-Thomson coefficient, T is temperature, P is pressure, and H is enthalpy.
Copper and silver are both metallic elements, but they have different properties. Copper is reddish-brown in color, while silver is shiny and white. They also have different melting points and densities.
1 calorie equals 4.18400 joules so multiply 1.987 by 4.184. 1.987 cal equals 8.313608 J.
A calorie is greater - it is equal to about 4.2 joules.
The Calorie.
a joule is smaller 1 kcal = 4.184 kj
Joule and calory are two different units for energy. "Quanta" is unrelated; it's the plural of "quantum".
its 4
A calorie equals approximately 4.18 joules. To convert calories to joules, multiply by 4.18 To convert joules to calories, divide by 4.18
4.18j
A joule, a Calorie...
1 calorie is 4.18 joules.
BTU/calorie/joule .
No, the calorie is an older unit. The SI unit is the Joule.
A calorie is the amount of energy that needed to raise the temperature of one gram of water one degree Celsius. The Joule is the SI unit for energy.