Two moles of an ideal monoatomic gas occupies a volume V at 27oC. The gas expands adiabatically to a volume 2 V. Calculate (a) the final temperature of the gas and (b) change in its internal energy.
(a) 195 K (b) 2.7 kJ
(a) 189 K (b) 2.7 kJ
(a) 195 K (b) −2.7 kJ
(a) 189 K (b) −2.7 kJ
As we learnt that
Equation of state -
- wherein
On solving
For Adibatic process
(r=5/3)
or
Option 1)
(a) 195 K (b) 2.7 kJ
This is incorrect
Option 2)
(a) 189 K (b) 2.7 kJ
This is incorrect
Option 3)
(a) 195 K (b) −2.7 kJ
This is incorrect
Option 4)
(a) 189 K (b) −2.7 kJ
This is correct
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