Calculating pressure change with temperature?

  • Thread starter ISX
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  • #1
ISX
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How do I determine pressure in psi, if I know the temperature. Like I aired my tires up to 80psi at 80F, how would I calculate what the pressure in my tires would be at 90F?
 

Answers and Replies

  • #2
russ_watters
Mentor
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With a constant volume: P1/T1=P2/T2. T is absolute temperature, so 80F is actually 80+460=540 R (Rankine scale).
 

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