What happens to the volume of the gas being measured (o2 consumption or co2 production) when the temperature or pressure changes during the experiment? if pressure and temperature remain constant, will the volume of gas in the respirometers increase or decrease?

Volume of a gas is directly proportional to its temperature and inversely proportional to its volume.

Explanation:

As per the gas law

where

are pressure of gas

are volume of gas

are temperature of gas

This equation shows that the pressure is inversely proportional to the volume of gas and directly proportional to the temperature of a gas

Thus, if pressure remains constant, the volume of gas will also remain constant (if all other physical and chemical condition remains the same)

that is true   : ) hope this you