MOLAR SPECIFIC HEAT Content
MOLAR SPECIFIC HEAT
MOLAR SPECIFIC HEAT
|
||
“Amount of heat energy required to raise the temperature of one mole of
a substance by one kelvin is called ‘Molar specific heat’”. |
||
It is denoted by “Cn“ | ||
Mathematically, | ||
D Q = n Cn DT
Where n = number of moles of substance OR Cn = DQ /n DT |
||
Unit Of Molar Specific Heat
|
||
J/mole K OR J mole-1 K-1.
|
||
|
||
MOLAR SPECIFIC HEAT OF GASES
|
||
Gases have two types of Molar specific heat because it depends whether the gas is allowed to expand or not when heated . | ||
|
||
MOLAR SPECIFIC HEAT AT CONSTANT VOLUME
|
||
“Amount of heat energy required to raise the temperature to one mole of a gas
by one kelvin at constant volume is called molar specific heat at constant volume”. |
||
It is denoted by Cv. | ||
MATHEMATICAL EXPRESSION
|
||
D Qv = n Cv D T
|
||
OR
|
||
Cv = D Qv /n D T
|
||
Unit: J/ mole K or J/ mole-1 K-1 |
||
At constant volume all the heat supplied is fully utilized in increasing the temperature of the gas. |