Calculating Tire Pressure: Ideal Gas Law and Temperature Change

[zcabral]

Homework Statement

An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. During the process, the air is compressed to 26.0% of its original volume and the temperature is increased to 32.0°C.
What is the tire pressure? Pa

Homework Equations

Pv=nRT P1V1/T1= P2V2/T2

The Attempt at a Solution

i used p1v1/t1=p2v2/t2 and got 4.15 Pa but it was wrong

 

[kamerling]

make sure you have the same units for p1 and p2

 

[zcabral]

yes i checked it. i used 1 atm for the original pressure and then changed it to pa

 

[alphysicist]

Hi zcabral,

It's difficult to follow your calculation without knowing the numbers you put into your calculation.

However, here I think you forgot to include p1 in your calculation. Or did you not convert it? Atmospheric pressure in pascals is about $$1.013\times 10^5$$ (did you use that number?), so the pressure your getting in your first post is tiny.