First slide

Gaseous state

Question

A quantity of hydrogen is confined in a chamber of constant volume. When the chamber is immersed in a bath of melting ice, the pressure of the gas is 1000 torr. What is the
temperature when the pressure is 400 torr?

Moderate

A

109.2°C
B

109.2K
C

273 K
D

100 K

Solution

$p \propto T (at constant volume) T_{2} = T_{1} \frac{p_{2}}{p_{1}} = 273 (temperature of melting ice) \times \frac{400}{1000} = 109.2 K$

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