Temperature and Pressure Calculation

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Discussion Overview

The discussion revolves around a formula proposed by a participant to calculate the resulting pressure from an increase in temperature within a fixed volume, utilizing Charles's Law and Boyle's Law. The scope includes theoretical exploration and practical application in physics, particularly in the context of gas behavior.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant introduces a formula for calculating pressure changes due to temperature increases, seeking feedback on its novelty and usefulness.
  • Another participant suggests researching the ideal gas law and equations of state as potentially relevant to the topic.
  • Clarification is sought regarding the meaning of P2 in the proposed formula, which is identified as the new pressure resulting from the temperature change.
  • Concerns are raised about the formula's behavior when there is no temperature change (x=0), with one participant noting that this leads to a final pressure of zero, while another later suggests that P2 should equal P1 in this case.
  • Participants engage in a back-and-forth regarding the implications of the formula under specific conditions, indicating some confusion and the need for further clarification.

Areas of Agreement / Disagreement

Participants express differing views on the validity and implications of the proposed formula, particularly regarding its behavior at zero temperature change. The discussion remains unresolved, with no consensus on the formula's correctness or applicability.

Contextual Notes

There are limitations in the discussion, including potential misunderstandings of the formula's behavior under specific conditions and the need for clearer definitions of variables involved.

Phil31
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Hi there,

New to the forum.

I decided to come here as I am currently working on a formula that will give me the resulting pressure as a result of an increase in temperature within fixed volume.

I have used Charles Law and Boyles law and combined them in a way that gives me this increase.

Firstly, I was wondering if this is anything new, I couldn't find anything exact when researching it so used Charles Law and Boyles law to come up with it

Secondly, Is this useful? I know it is for me but in a general physics application?

So far it has held up to tests (that have not been all that scientific but as accurate as possible given my limited resource).

The formula is:

Where x is temperature increase in celsius

P2 = P1 - (P1 x V1 x T1)/(x+T1)xV1

P is in Pascals
V in any metric unit
T is in kelvin

A bit about me, I have a Degree in Marketing and Economics but work in the Gas Industry.

Any feed back would be appreciated

Cheers
 
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Phil31 said:
Hi there,

New to the forum.

I decided to come here as I am currently working on a formula that will give me the resulting pressure as a result of an increase in temperature within fixed volume.

I have used Charles Law and Boyles law and combined them in a way that gives me this increase.

Firstly, I was wondering if this is anything new, I couldn't find anything exact when researching it so used Charles Law and Boyles law to come up with it

Secondly, Is this useful? I know it is for me but in a general physics application?

So far it has held up to tests (that have not been all that scientific but as accurate as possible given my limited resource).

The formula is:

Where x is temperature increase in celsius

P2 = P1 - (P1 x V1 x T1)/(x+T1)xV1

P is in Pascals
V in any metric unit
T is in kelvin

A bit about me, I have a Degree in Marketing and Economics but work in the Gas Industry.

Any feed back would be appreciated

Cheers
What is P2 in your formula?
 
nasu said:
What is P2 in your formula?

P2 is the the New Pressure as a result of the temperature change.
 
Then you have a problem. It seems that if x=0 (so no change in temperature) the final pressure is zero.
 
nasu said:
Then you have a problem. It seems that if x=0 (so no change in temperature) the final pressure is zero.

That would be correct as no change in temperature will mean no change in pressure as there is no expansion (or contraction) of the gas. The formula calculates the effect of temp on pressure in a vessel.
 
Phil31 said:
That would be correct as no change in temperature will mean no change in pressure as there is no expansion (or contraction) of the gas. The formula calculates the effect of temp on pressure in a vessel.
My mistake i see wgat you are saying now will check that
 
nasu said:
Then you have a problem. It seems that if x=0 (so no change in temperature) the final pressure is zero.

Just checked and you end up with P2 being equal to p1. Am i missing something?
 

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