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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 conversion factor from R (Rankine) to ft•lbf/lbmol•°R (foot pound-force per pound-mole per degree Rankine) is 1 ft•lbf/lbmol•°R = 1.8 R. This means that to convert a value in R to ft•lbf/lbmol•°R, you simply need to multiply it by 1.8.
Ft•lbf/lbmol•°R is a unit commonly used in thermodynamics and fluid mechanics to measure energy, specifically in relation to temperature. It is often used to calculate the amount of heat required to raise the temperature of a substance by a certain number of degrees Rankine.
Yes, the conversion from R to ft•lbf/lbmol•°R can be applied to any substance as long as the temperature is in Rankine. This unit conversion is independent of the substance being measured and is solely based on the temperature scale being used.
The conversion from R to ft•lbf/lbmol•°R is similar to the conversion from Kelvin to Joules in that both involve a change in temperature. However, the units ft•lbf/lbmol•°R and Kelvin measure different types of energy. Ft•lbf/lbmol•°R measures thermal energy while Joules measure mechanical or kinetic energy.
Yes, there are other units that are equivalent to ft•lbf/lbmol•°R, such as Btu/lb•°R (British thermal unit per pound per degree Rankine). Both units are used to measure thermal energy per unit mass and are equivalent to each other. The choice of which unit to use may depend on the specific application or preference of the scientist.