How can I convert R to units of ft•lbf/lbmol•°R?

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Homework Help Overview

The problem involves converting the gas constant, R, from its SI units to the specified units of ft•lbf/lbmol•°R. The original value provided is R = 8.31451 J/mol•°C, and participants are exploring the implications of unit conversions, particularly with respect to the definitions of lbmol and the Rankine temperature scale.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are questioning the definition of lbmol and whether it should simply be mol. There is also confusion regarding the conversion factors for units of energy and force, with some participants attempting to clarify the relationships between different unit systems.

Discussion Status

The discussion is ongoing, with participants sharing insights and clarifications about the units involved. Some have pointed out the need to refer back to unit conversion resources, indicating a productive direction in addressing the confusion surrounding the problem.

Contextual Notes

There is mention of unit conversion handouts that may provide additional context, suggesting that participants are working within specific constraints set by the assignment. The original poster has confirmed the exact wording of the assignment, which includes the term lbmol.

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Homework Statement



"convert the gas constant, R, into units of ft•lbf/lbmol•°R.
Data: R = 8.31451 J/mol•°C.
"

Homework Equations



I know 1 J = 0.22481 lbf

but what's R, and how they can get ft and lb in there?

The Attempt at a Solution

 
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Is that exactly how the question is given? I'm confused by lbmol... shouldn't it just be mol ?

Also,

1 N = 0.22481 lbf, not 1 J.
 
yes, I just copy pasted from that assignment(given to us in a word document)
I think it is then lb mol
 
These are some tricky units. A regular mole in SI units = 1 gram mole. 1 K = 1.8 R. R is rankine a scale of temperature.
 
Thanks a lot!

yesterday, I forgot to see the unit conversion handouts provided, and these were in there.
 

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