AP EAMCET · PHYSICS · Thermodynamics
When 80 J of heat is supplied to a gas at constant pressure, if the work done by the gas is 20 J, then the ratio of the specific heat capacities of the gas is
- A \(\frac{4}{3}\)
- B \(\frac{5}{3}\)
- C \(\frac{7}{5}\)
- D \(\frac{9}{7}\)
Answer & Solution
Correct Answer
(A) \(\frac{4}{3}\)
Step-by-step Solution
Detailed explanation
\( \Delta U = Q_p - W = 80 \, \text{J} - 20 \, \text{J} = 60 \, \text{J} \) \( \gamma = \frac{C_p}{C_v} = \frac{Q_p}{\Delta U} = \frac{80 \, \text{J}}{60 \, \text{J}} = \frac{4}{3} \)
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