Temperature increase with pressure in an open vessel?

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Discussion Overview

The discussion revolves around the relationship between temperature and pressure in an open vessel, specifically in the context of applying pressure to an olive in a panini press-like scenario. Participants explore whether temperature increases linearly with pressure and seek to understand the implications for avoiding overheating the olive oil.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions whether temperature would increase at all in an open vessel, suggesting that gas laws may not apply and that friction and compression are not relevant in this scenario.
  • Another participant expresses uncertainty about the temperature increase, indicating that they are trying to avoid exceeding a certain temperature.
  • A different viewpoint suggests that the compressibility of oil and olives is low, implying that significant heating may not occur due to the high thermal mass of the pistons, which could keep the olive at a similar temperature.
  • Participants discuss the potential for calculating temperature changes using pressure, volume, and heat capacity, but note that the high heat capacity of the pistons may render any temperature change negligible.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether temperature will increase with pressure in this scenario, and multiple competing views remain regarding the factors influencing temperature changes.

Contextual Notes

There are limitations regarding the assumptions about compressibility, the applicability of gas laws in an open vessel, and the influence of thermal mass on temperature changes. These factors remain unresolved in the discussion.

doubleddeez
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Hello all, new here please excuse if this is in the wrong area of the forum.

My question is does temperature increase in a linear fashion when pressure is added? What formula can be used to accurately monitor temperature increase as pressure is added?

Imagine having a set temperature, let's say 200°F, that is constant and governed by an electronic heat source. So it would be like a panini press, or sandwich press, with two metal surfaces on top and bottom. If you were to place a dried olive in the "open press" and add pressure(anywhere from 100lbs to 2000lbs) so as to "squish" and release its oils, how much of an increase in temperature would there be?

I am trying to avoid burning the olive oil or surpassing 250°F. Does Gay-Lussac law apply here?

Thank you in advance for any help or guidance.
 
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I am no physicist but I don't see why the temp would increase at all. In an open vessel, gas laws won't apply. The only possible source of increased temperature would be friction and compression (why a screw heats up when drilled into wood), but that won't apply here either (unless you're trying to compress the olive pit).
 
Thank you Dave for your response. I wasnt totally sure whether the temperature would increase, which is what I am trying to avoid. No the pit will not be in the olive when pressing.
 
I don't think oil and olives are compressible enough for much heating to take place. The pistons are probably a large thermal mass, so the olive will take the same temperature as the pistons. If you have the pressure vs volume and heat capacity, you can probably calculate it, but again, the heat capacity of the pistons is probably so high that the temperature change is negligible.
 

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