A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change? Use .

Answer : The pressure after the temperature change is, 0.752 atm

Explanation :

Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.

or,

where,

= initial pressure = 0.82 atm

= final pressure = ?

= initial temperature =

= final temperature =

Now put all the given values in the above equation, we get:

Thus, the pressure after the temperature change is, 0.752 atm