# NEET Physics Thermodynamics Questions Solved

A container of volume 1m3 is divided into two equal compartments by a partition. One of these compartments contains an ideal gas at 300 K. The other compartment is vaccum. The whole system is thermally isolated from its surroundings. The partition is removed and the gas expands to occupy the whole volume of the container. Its temperature now would be -

(1) 300 K

(2) 239 K

(3) 200 K

(4) 100 K

(1) This is the case of free expansion and in this case $\Delta W=0$, $\Delta U=0$ so temperature remains same i.e. 300 K.

Difficulty Level:

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