Constant-volume gas thermometer

  • Thread starter Thread starter Rblswimmer456
  • Start date Start date
  • Tags Tags
    Gas Thermometer
Click For Summary

Homework Help Overview

The problem involves a constant-volume gas thermometer, with given pressures at two temperatures (0.811 atm at 100°C and 0.5 atm at 0°C). The questions focus on determining the temperature corresponding to a specific pressure (0.656922 atm) and the pressure at a higher temperature (138°C).

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss using the provided pressures and temperatures to establish relationships, questioning how to apply the ideal gas law given the non-ideal behavior of the gas.

Discussion Status

Some participants suggest using the two known points to derive a linear relationship, while others express concerns about the gas's deviation from ideal behavior affecting the calculations. There is no explicit consensus on the best approach yet.

Contextual Notes

Participants note the challenge posed by the gas not behaving ideally, which may complicate the application of the ideal gas law. The need to resolve part A before addressing part B is also mentioned.

Rblswimmer456
Messages
6
Reaction score
0

Homework Statement



The pressure in a constant-volume gas ther-
mometer is 0.811 atm at 100◦C and 0.5 atm
at 0◦C.

A) What is the temperature when the pressure
is 0.656922 atm?
Answer in units of ◦C.

B) What is the pressure at 138◦C?
Answer in units of atm.


Homework Equations



well I know that P1/T1=P2/T2 but I don't know how to go about it since two pressure and temperatures are given so I don't know the formula to find the third.

for part B I figured I would have to get part A before attempting the second part.


The Attempt at a Solution

 
Physics news on Phys.org
They gave you the pressures at two temperatures. You can use either one as P1 and T1.

I mean P1 and the corresponding T1 that is.
 
I think the main problem is that the gas differs from ideal behaviour and by a substantial amount.Using the given data P/T is nowhere near constant.
 
Then it is likely that some sort of linear relationship should be found using the two points.
 

Similar threads

Calculating ΔE Difference for 2 Samples of Monatomic Ideal Gas
  • · Replies 4 ·
Replies
4
Views
2K
Calculate ideal-gas temperature of a material
  • · Replies 2 ·
Replies
2
Views
2K
Thermodynamics: gas expansion formula or approximation error?
  • · Replies 2 ·
Replies
2
Views
1K
Gas temperature in a constant volume
  • · Replies 8 ·
Replies
8
Views
2K
How could the discrepancy be reduced between the two readings?
  • · Replies 10 ·
Replies
10
Views
2K
Thermodynamics problem (ideal gas law, kinetic theory, processes, etc.)
  • · Replies 18 ·
Replies
18
Views
2K
Open Gas Turbine - calculate T2, T3, T4, efficiency
  • · Replies 1 ·
Replies
1
Views
2K
The specific work done on an ideal gas during an adiabatic process in a piston-cylinder system
  • · Replies 13 ·
Replies
13
Views
2K
Calculate Temperature of Nitrogen Gas at 2 atm Pressure
  • · Replies 7 ·
Replies
7
Views
2K
Thermodynamics of a Constant Volume Gas Thermometer
  • · Replies 25 ·
Replies
25
Views
5K