What is R when pressure is mmHg?

The key is usually pressure. For P in atm use R = 0.082057 atmL/molK. For P in kPa use R = 8.31446 kPaL/mol. For P in mmHg or Torr use R = 62.36367 mmHgL/molK.

How do I know which R value to use?

Typically, a higher insulation R rating means better climate control and better energy efficiency for your home. A higher insulation R-value usually means a higher price point as well. For every type and material of insulation, check the R-value per inch of thickness that the manufacturer has listed.

How do you find r in pressure?

The value of the gas constant ‘R’ depends on the units used for pressure, volume and temperature.

1. R = 0.0821 liter·atm/mol·K.
2. R = 8.3145 J/mol·K.
3. R = 8.2057 m3·atm/mol·K.
4. R = 62.3637 L·Torr/mol·K or L·mmHg/mol·K.

Which R is used when pressure is given in Torr?

As long as the pressure is in atmospheres and the volume in L, then you use b. since it is the only one with L and atm in its units. If the pressure is in torr or mmHg and the volume in L, then you use c .

How do you know which R to use in PV nRT?

The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K. This means that for air, you can use the value R = 287 J/kg·K.

What is r in PV RT?

In the equation PV=nRT, the term “R” stands for the universal gas constant. The universal gas constant is a constant of proportionality that relates the energy of a sample of gas to the temperature and molarity of the gas. It is sometimes called the ideal gas constant, the molar gas constant.

What is the R constant in PV NRT?

= 8.314 J/mol
The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K.

What is the value of the gas constant ‘R’?

One common value is 8.3145 J/mol·K. The value of the gas constant ‘R’ depends on the units used for pressure, volume and temperature. Some people assume the symbol R is used for the gas constant in honor of the French chemist Henri Victor Regnault, who performed experiments that were first used to determine the constant.

How to change pressure from mmHg to KPA?

Pressure in mm Hg may be changed to kPa by multiplying mm Hg x 0.13332 and using R of 8.1345 BUT I’ve not seen that done. You can try this yourself.

How do you convert mm Mercury to atm pressure?

If you have pressure listed in mm mercury, change to atm by dividing by 760 mm/1 atm, then use R as 0.08206 L*atm/mol*K. If pressure is in kPa, use R as 8.3145 J/mol*K (kPa*L/mol*K). Pressure in mm Hg may be changed to kPa by multiplying mm Hg x 0.13332 and using R of 8.1345 BUT I’ve not seen that done.

What units are used to measure the universal gas constant?

These include the most commonly used values for the universal gas constant when working in metric units, SI units, English engineering units and US customary units.