NEET Physics Thermodynamics Questions Solved

A closed hollow insulated cylinder is filled with gas at 0°C and also contains an insulated piston of negligible weight and negligible thickness at the middle point. The gas on one side of the piston is heated to 100°C. If the piston moves 5 cm, the length of the hollow cylinder is -

(1) 13.65 cm

(2) 27.3 cm

(3) 38.6 cm

(4) 64.6 cm

(4) Using Boyle’s law, we have $\frac{V}{T}=$ constant

$\frac{\frac{l}{2}+5}{373}=\frac{\frac{l}{2}-5}{273}$

As the piston moves 5 cm, the length of one side will be $\left(\frac{l}{2}+5\right)$and other side $\left(\frac{l}{2}-5\right)$. On solving this equation, we get l = 64.6 cm.

Difficulty Level:

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