Chang makes the diagram below to compare gay-lussac’s law and charles’s law.

which label belongs in the region marked x?

a involves changes in temperature

b has a constant volume

c shows an inversely proportional relationship

d does not involve pressure changes

a involves changes in temperature

Explanation:

Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant.

Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas, when the pressure is kept constant.

The diagram shows what Gay-Lussac’s law and Charles’s law have in common. And both laws involve changes in temperature.

c is the answer because when something is left after something evaporates that shows the chemical change.