First slide

Thermal expansion

Question

Temperature remaining constant, the pressure of gas is decreased by 40%. The percentage change in volume

Moderate

A

Increases by 66%
B

Decreases by 66 %
C

Increases by 33 %
D

Decreases by 33 %

Solution

PV=nRT
$P V = \frac{3}{5} P V' V' = \frac{5}{3} V$

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