How Does Temperature Scale Impact Gas Pressure Calculations in Thermometers?

Click For Summary

Homework Help Overview

The discussion revolves around the impact of temperature scales on gas pressure calculations in thermometers, specifically using a constant-volume gas thermometer with given pressure and temperature values.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to use a formula from their textbook to find the pressure at a different temperature but encounters difficulties. Some participants suggest using the ideal gas law relationship, while others emphasize the necessity of converting Celsius to Kelvin for accurate calculations. There are repeated inquiries about the rationale behind using Kelvin.

Discussion Status

Participants are exploring the reasons for temperature conversion and discussing the implications of using different temperature scales. There is no explicit consensus yet, but some guidance on the importance of absolute temperature is being provided.

Contextual Notes

There appears to be confusion regarding temperature conversions and the underlying principles of gas laws. The original poster's method and the textbook reference are not yielding the expected results, indicating potential misunderstandings in the application of the concepts.

FishieKissie06
Messages
6
Reaction score
0
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.
 
Physics news on Phys.org
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.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
2
Views
1K
Replies
8
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K