The temperature is -13 degrees celsius, the air pressure in a car tire is 2.5 atm. If the volume does not change, what will the temperature in celsius be if the pressure is 1.2 atm?

Question

Chemistry question of gas laws, 10th grade. Find the pressure from a given temperature and air pressure.

Answer 1

Combined gas law at constant volume = Gay-Lussac's law

P1/T1 = P2/T2

P1 = 2.5 atm

T1 = -13 + 273 = 260K

P2 = 1.2 atm

T2 = ?

Solve for T2 and don't forget to subtract 273 to convert back to degrees celsius.