Answer to Question #110293 in General Chemistry for claire

Question

The air pressure in my tires is about 35 psi when the temperature is 25 oC outside. What will the pressure in my tires be on a cold day with a temperature of -12 oC?

Answer 1

As pV=nRT so volume and number of moles is constant so $\frac{p}{T}=constant$

$\dfrac{p_1}{T_1}=\dfrac{p_2}{T_2}\\ \dfrac {35}{273+25}=\dfrac{p_2}{273-12}\\p_2=30.65\ psi$