JEE Mains · Physics · STD 11 - 11. thermodynamics
Heat is supplied to a diatomic gas at constant pressure. Then the ratio of \(\Delta Q : \Delta U : \Delta W\) is _______.
- A \(2 : 3 : 5\)
- B \(5 : 3 : 2\)
- C \(2 : 5 : 7\)
- D \(7 : 5 : 2\)
Answer & Solution
Correct Answer
(D) \(7 : 5 : 2\)
Step-by-step Solution
Detailed explanation
For a diatomic gas, the number of degrees of freedom is \(f = 5\). The molar heat capacity at constant volume is \(C_v = \dfrac{f}{2}R = \dfrac{5}{2}R\). The molar heat capacity at constant pressure is \(C_p = C_v + R = \dfrac{7}{2}R\). At constant pressure, the heat supplied is…
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