On a Reliable Jing 'an Model

(1) Assuming that △h remains unchanged after the ambient temperature is lowered, the two parts of gas will change in the same volume, which is obtained by Charlie's law:

For left qi: △ p = p1t1△ t.

For the gas on the right: △ p ′ = p2t1△ t.

According to the meaning of the question, p 1 > p2,

Therefore, there are: △ p >△ p',

If the temperature decreases, the pressure decreases, and the left gas pressure decreases a lot, the mercury column will move down. Obviously, the original assumption is wrong, and △h will decrease.

(2) If △h remains unchanged after a small amount of mercury is released through the valve K, the gas pressure remains unchanged because there is a vacuum above the mercury in the right arm.

According to the left part, the gas volume will increase, but the gas temperature will remain unchanged. From pV=c, it can be seen that the gas pressure will decrease, and a contradictory conclusion is drawn, so the original assumption is wrong, so the △h will decrease after stabilization.

So the answer is: smaller; Make smaller