KCET · Physics · Thermodynamics
In an adiabatic expansion of an ideal gas the product of pressure and volume
- A decreases
- B increases
- C remains constant
- D at first increases and then decreases
Answer & Solution
Correct Answer
(A) decreases
Step-by-step Solution
Detailed explanation
In an adiabatic expansion, internal energy decreases and hence temperature also decreases. Hence, from ideal gas equation,
\(p V=n R T\)
Since, \(T\) decreases.
Hence, \(p V\) also decreases.
\(p V=n R T\)
Since, \(T\) decreases.
Hence, \(p V\) also decreases.
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