How Does Temperature Scale Impact Gas Pressure Calculations in Thermometers?

AI Thread Summary
The discussion centers on calculating gas pressure at different temperatures using the ideal gas law. It highlights the need to convert Celsius to Kelvin for accurate calculations, as Kelvin is the absolute temperature scale necessary for thermodynamic equations. The formula P1/T1 = P2/T2 is emphasized for solving pressure changes, with an example using a pressure of 87.0 kPa at 104°C. Participants clarify that using Kelvin avoids negative values that can distort calculations. Understanding the importance of the absolute temperature scale is crucial for accurate gas pressure calculations in thermometers.
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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.
 
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use P1/T1 = P2/T2 ...solve for P2

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

don't forget to convert C to Kelvins.
 
but y would i convert to kelvins?
 
but y would i convert to kelvins?
 
"Why Kelvin?" Because there is no temperature scale other than the "absolute," or "thermodynamic" temperature scale, be it Kelvin or Rankine.
 

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