# If you want to study the relationship between temperature and pressure of a gas, which factor must be held constant?

##### 2 Answers

Apr 14, 2018

#### Answer:

I would say Volume:

#### Explanation:

I was thinking of Gay-Lussac Law:

Apr 14, 2018

#### Answer:

Volume and number of moles of gas

#### Explanation:

There exist a relationship between the temperature and pressure of gases. If the volume and the number of moles of gas are kept constant, then the temperature is **directly proportional** to the pressure of the gas.

This is known as Gay-Lussac's law.

In an equation form, it is written as:

where

If we want to compare the temperature/pressure of a gas after increasing one of its variables, the equation becomes:

#P_1,P_2# are the pressures of the two gases

#T_1,T_2# are the temperatures of the two gases