Gas pressure in thermometer

[FishieKissie06]

The gas in a constant-volume gas thermometer has a pressure of 87.0kPa at 104*C.

(a)what is the pressure of the gas at 50.0*C?
for this i used the eqn of (87/104)(104-50) like it said in the book and still didnt get the answer right.

[kp]

use P1/T1 = P2/T2 ...solve for P2

= (P1*T2)/(T1) = P2

don't forget to convert C to Kelvins.

[FishieKissie06]

but y would i convert to kelvins?

[FishieKissie06]

but y would i convert to kelvins?

[Bystander]

"Why Kelvin?" Because there is no temperature scale other than the "absolute," or "thermodynamic" temperature scale, be it Kelvin or Rankine.