First slide

laws

Question

An ideal gas obeys an additional law PV² = constant. Initially the gas is at 400 K. What is the temperature if it expands to 2V

Moderate

A

100 K
B

200 K
C

300 K
D

400 K

Solution

PV² = constant PV = nRT
$\frac{nRT}{V} V^{2} = constant p = \frac{nRT}{V}$
TV = constant
if V becomes 2V and T becomes T/2

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