Chongming district property community glass clean

Let's assume that the mercury column does not move.

In (a), let the pressure difference P0 generated by mercury column, the pressure P 1 of I and the pressure P2 of II, and their relationship is: P 1=P2+P0.

If the isothermal △T is increased, the key Charles law is: p1t 0 = p1+△ p1t 0+△ t1.

P2T0=P2+△P2T0+△T②

Simultaneous solution: △ p1△ p2 = p1p2 = p2+p0p2 >1p3,

Namely: △ p 1 > △ p2.

So the mercury column will move upward.

In (b), because the pressure on the left and right sides is equal, the mercury column remains motionless after raising the same temperature, which can be obtained by ③ formula: △ 1=△P2.

So the answer is: move to II, not move.