Verified Solution • 2025–26 Session
moderate
QAIPMT-2002-Ch-2762: NEET 2002 Chemistry - Class 11 AIPMT-2002-Ch-2762 Solution: 2 mole of ideal gas at \(27^ C\) temperature is expanded…
2 mole of ideal gas at temperature is expanded reversibly from 2 lit. to 20 lit. Find entropy change. (R = 2 cal/mol K)
Multiple Choice Options
- A 92.1
- B 0
- C 4
- D 9.2
Step-by-Step Verified Solution
For isothermal reversible expansion
w = q = nRT _ 2.303 log _ v 2 v 1
= 2RT _ 2.303 log _ 20 2
= 2 _ 2 _ T _ 2.303 _ 1 = 9.2 T
Entropy change, _ S = q T = 9.2 T T = 9.2 cal/mol K