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