Everything that happens in nature, it always has science in it, the changes, the reactions, in the atmosphere, etc., everything has something scientific behind it. Changes might be visible to people but the scientific reasoning is not visible to everybody.
For example, boiling of water, if a person puts water to boil the boiling will be visible to the person, the vapour, the temperature change everything would be felt or seen but the chemical reasoning behind it might get neglected, as boiling water is an extremely basic activity. Likewise, every basic to advance activity has some or the other scientific reasoning behind it.
Heat, temperature, etc., are quite basic terms which everybody comes across in day to day life, and the use of these terms in the language of science is more often. In science, heat is described as a form of energy which is transferred between two objects At different temperatures.
Specific Heat vs Heat Capacity
The main difference between specific heat and heat capacity is the difference of mass in the calculation. Both of them are defined as the amount of energy required to raise the temperature but, in specific heat, the capacity is calculated per unit mass of a substance.
Comparison Table Between Specific Heat and Heat Capacity
| Parameters of Comparison | Specific heat | Heat capacity |
| Definition | It is the amount of heat energy required by a unit of mass of a substance to raise its temperature through1℃ or 1 k. | It is the amount of heat energy required by a substance to raise its temperature by 1℃ or 1 K. |
| Dependency on mass | Does not depend on mass. | Depends on mass. |
| SI unit | Joule per kilogram per Kelvin (J Kg⎺1 K⎺1) or Joule per kilogram per degree Celsius (J Kg⎺1 ℃⎺1) | Joule per Kelvin (J K⎺1) or Joule per degree (J ℃⎺1) |
| Formula | Q = mc T | C = Q/ T |
| Denoted by | c | C |
What is Specific Heat?
Specific heat is defined as the amount of heat energy required by a unit of mass of a substance to raise its temperature through1℃ or 1 k.
Specific heat can be calculated theoretically through formula, which is
Q = mc T
- Q – heat energy
- m – mass
- c – specific heat capacity
- T – change in temperature
Specific heat capacity does not depend on the mass of the substance. The SI unit of specific heat is Joule per kilogram per Kelvin (J Kg⎺1 K⎺1) or Joule per kilogram per degree Celsius (J Kg⎺1 ℃⎺1).
Specific heat can be explained through example, like on a beach the sand might be hot but the water is cold, although they both are receiving the same amount of heat from the sun, still, the temperatures are different. This happens because every material has its heat capacity. And this is known as specific heat capacity or specific heat.
Specific heat or specific heat capacity can be seen in day to day life, it is chemical reasoning of heat process in different materials, which can be calculated theoretically through its formula.
What is Heat capacity?
In science, heat capacity is defined as the amount of heat energy required by a substance to raise its temperature by 1℃ or 1 K. Unlike specific heat, heat capacity is dependent on the mass of the substance.
Heat capacity can be calculated theoretically through formula, which is
C = Q/ T
- C – heat capacity
- Q – heat energy supplied to bring change in temperature of the substance
- T – rise in temperature
Heat capacity depends on the mass of the substance. The SI unit of heat capacity is Joule per Kelvin (J K⎺1) or Joule per degree (J ℃⎺1). Unlike specific heat, it does not include the mass of substance due to which unit does not include kilograms or grams.
Heat capacity can be explained through an example like iron heats or cools down quickly because it has low heat capacity. On the other hand, water takes time to get hot or cold because it has a high heat capacity. This means heat capacity is related to substance potential to retain heat energy and the rate it will get cool or warm-up.
Heat capacity varies from substance to substance, water is said to have the highest heat capacity, in Other words, water requires more heat energy to raise its temperature. Sometimes, the temperature change is different in different water bodies, as a smaller amount it will get heated more quickly as compared to large water bodies like oceans.
Main Differences Between Specific Heat and Heat Capacity
- Specific heat is the amount of heat energy required by a unit of mass of a substance to raise its temperature through1℃ or 1 k.On the other hand, heat capacity is the amount of heat energy required by a substance to raise its temperature by 1℃ or 1 K.
- Specific heat is not dependent on the mass of the substance on the other hand heat capacity is dependent on the mass of the substance.
- The SI unit of specific heat is Joule per kilogram per Kelvin (J Kg⎺1 K⎺1) or Joule per kilogram per degree Celsius (J Kg⎺1 ℃⎺1). Whereas the SI unit of heat capacity is Joule per Kelvin (J K⎺1) or Joule per degree (J ℃⎺1).
- The formula of specific heat is Q = mc T, on the other hand, the formula to calculate heat capacity is C = Q/ T.
- Specific heat is denoted by c, on the other hand, heat capacity is denoted by C.
Conclusion
Specific heat and heat capacity is almost the same, the major difference is that the specific heat is calculated as per unit mass of the substance.
Both of them can be calculated theoretically through formulas given in physics textbooks.
Specific heat is also known as specific heat capacity which sometimes creates confusion for The reader, but they are the same thing.
References
- https://journals.aps.org/prb/abstract/10.1103/PhysRevB.4.2029
- https://www.annualreviews.org/doi/full/10.1146/annurev.physchem.56.092503.141202