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Which of the following gas molecule has the maximum specific heat at constant pressure?
- a)argon
- b)helium
- c)oxygen
- d)nitrogen
Correct answer is option 'C'. Can you explain this answer?
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Which of the following gas molecule has the maximum specific heat at c...
Explanation:
Specific heat is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. At constant pressure, the specific heat is known as the specific heat capacity at constant pressure (Cp).
The specific heat capacity is dependent on the molecular structure of the substance. The gas molecule with more degrees of freedom has a higher value of Cp.
The degree of freedom of a gas molecule is the number of independent ways in which it can move. The degree of freedom for monoatomic gases is 3 and for diatomic gases is 5.
Out of the given options, oxygen is a diatomic gas, and it has five degrees of freedom. Hence, it has the highest specific heat capacity at constant pressure among the given options.
Therefore, the correct answer is option C, oxygen.
Specific heat is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. At constant pressure, the specific heat is known as the specific heat capacity at constant pressure (Cp).
The specific heat capacity is dependent on the molecular structure of the substance. The gas molecule with more degrees of freedom has a higher value of Cp.
The degree of freedom of a gas molecule is the number of independent ways in which it can move. The degree of freedom for monoatomic gases is 3 and for diatomic gases is 5.
Out of the given options, oxygen is a diatomic gas, and it has five degrees of freedom. Hence, it has the highest specific heat capacity at constant pressure among the given options.
Therefore, the correct answer is option C, oxygen.
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Which of the following gas molecule has the maximum specific heat at c...
In case of oxygen both diatomic(O2) and tratomic(O3) is possible. For, diatomic and tratomic, linear value of Cp is same. But for triatomic non-linear value of Cp is 4R. Hence, oxygen has the maximum value of specific heat at constant pressure if we have taken triatomic form of oxygen.
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