First slide

laws

Question

A closed hollow insulated cylinder is filled with gas at 0^oC and contains Insulated piston of negligible mass and negligible thickness at middle Point. Without changing temperature on one side, temperature on other Side is heated to 100^oC. If piston moves by 5 cm, Length of hollow cylinder is

Moderate

A

32.3 cm
B

64.6 cm
C

129.2 cm
D

27.2 cm

Solution

For the pair in which temp does not change
$p_{0} . (\frac{AL}{2}) = p_{1} (A) (\frac{L}{2} - 5)$
For the pair in which temp increases
$\frac{P_{0} V_{0}}{273} = \frac{P_{0} A (\frac{L}{2} + 5)}{373}$

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