What is the difference between specific heat and enthalpy of formation?
Answer
Verified551.1k+ views
Hint: In thermodynamics, enthalpy is a property of a substance which is defined as the sum of its internal energy and product of its pressure and volume and specific heat represents the rise in temperature of liquid due to heat transfer to the system.
Complete answer:
Although specific heat and enthalpy of formation are two different terms but the difference between these terms can be summarized as per following table:
Note:
It is important to note that students might get confused with terms specific heat and heat capacity. Remember that specific heat is the amount of heat per unit mass needed to raise the temperature by one unit whereas heat capacity is the amount of heat needed to raise the temperature of the entire body by one unit.
Complete answer:
Although specific heat and enthalpy of formation are two different terms but the difference between these terms can be summarized as per following table:
| Specific heat | Enthalpy of formation | |
| Definition | The amount of heat required to raise the temperature of one gram of a substance by one-degree Celsius. | The amount of heat evolved or absorbed when one mole of a compound is formed from its constituent elements, given that each element is present in its standard physical state. |
| Units | It is usually expressed in calories or joule per gram per degree Celsius $ \left[ {J{{\left( {g{\;^o}C} \right)}^{ - 1}}} \right] $ . | It is usually expressed in kilojoule per mole $ kJmo{l^{ - 1}} $ . |
| Formula | $ c = \dfrac{Q}{{m\Delta T}} $ , where Q represents heat energy, m represents mass and $ \Delta T $ represents change in temperature. | $ \Delta H_f^o = \sum n H_{f({\text{products)}}}^o - \sum m H_{f({\text{reactants)}}}^o $ , where m and n represent the coefficient of reactants and products of the balanced chemical reaction respectively. |
| Property | It is an intensive property i.e., it does not depend on the amount of matter present. | It is an extensive property i.e., it depends on the amount of matter present in the reaction. |
Note:
It is important to note that students might get confused with terms specific heat and heat capacity. Remember that specific heat is the amount of heat per unit mass needed to raise the temperature by one unit whereas heat capacity is the amount of heat needed to raise the temperature of the entire body by one unit.
Recently Updated Pages
If x a + bt + ct2 where x is in meters and t is in class 11 physics CBSE
A car covers the first half distance between two places class 11 physics CBSE
The resultant of two vectors overrightarrow P and overrightarrow class 11 physics CBSE
Find the value of cos 135 class 11 maths CBSE
A mass M is held in place by an applied force F and class 11 physics CBSE
A solution of glucose in water is labelled as 10 dfracwv class 11 chemistry CBSE
Trending doubts
One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE
Find the value of the expression given below sin 30circ class 11 maths CBSE
What do you mean by retardation What is its SI uni class 11 physics CBSE
Draw a diagram of nephron and explain its structur class 11 biology CBSE
10 examples of friction in our daily life
Difference between physical and chemical change class 11 chemistry CBSE