Problem

A glass bulb of volume

400\text{ cm}^3

is connected to another of volume

20\text{ cm}^3

by means of a tube of negligible volume. The bulbs contain dry air and are both at a common temperature and pressure of

20^\circ\text{C}

and

1.00\text{ atm}

. The larger bulb is immersed in steam at

100^\circ\text{C}

and the smaller in melting ice at

0^\circ\text{C}

. Find the final common pressure.