# Easy: find pressure

1. Apr 20, 2008

### zcabral

1. The problem statement, all variables and given/known data
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

2. Relevant equations
Pv=nRT P1V1/T1= P2V2/T2

3. The attempt at a solution

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

2. Apr 20, 2008

### kamerling

make sure you have the same units for p1 and p2

3. Apr 20, 2008

### zcabral

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

4. Apr 20, 2008

### alphysicist

Hi zcabral,

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.