Thermodynamics Question 19
Question: Compressed air in the tube of a wheel of a cycle at normal temperature suddenly starts coming out from a puncture. The air inside
[NCERT 1970]
Options:
A) 2077.5 joules
B) 207.5 joules
C) 207.5 ergs
D) None of the above
Show Answer
Answer:
Correct Answer: A
Solution:
$ W=\frac{R}{\gamma -1}(T _{1}-T _{2}) $
$ =\frac{8.31\times {(273+27)-(273+127)}}{1.4-1}=-2077.5\ joules $
