# Can you use mmHg in ideal gas law? ### Can you use mmHg in ideal gas law?

Evaluating the Ideal Gas Constant However, pressure is commonly measured in one of three units: kPa, atm, or mmHg. ... We can substitute 101.325 kPa for pressure, 22.414 L for volume, and 273.15 K for temperature into the ideal gas equation and solve for R.

### What unit of pressure is needed for PV nRT?

Pascals The units used in the ideal gas equation that PV = nRT are: P is pressure measured in Pascals. V is the volume measured in m. n is the number of moles.

### What is the Ideal Gas Law constant for mmHg?

The constant R is called the ideal gas law constant. Its value depends on the units used to express pressure and volume....Learning Objectives.
Numerical ValueUnits
62.36L·torr/mol·K = L·mmHg/mol·K
8.314J/mol·K

### Do units matter for PV nRT?

ALWAYS make sure that the units you use for R match the units for P,V,n , and T . The major difference will be that the pressure is given in atmospheres or millimetres of mercury or bars or millibars, and volume may be in litres or millilitres.

### Is mmHg pressure or volume?

A barometer measures gas pressure by the height of the column of mercury. One unit of gas pressure is the millimeter of mercury (mmHg). An equivalent unit to the mmHg is called the torr, in honor of the inventor of the barometer, Evangelista Torricelli. The pascal (Pa) is the standard unit of pressure.

### What is R in PV nRT for mmHg?

Since PV= nRT, so R = PV/nT or we can say R equals (pressure × volume) / (amount of gas × temperature). ... For pressure we use units like atm, kPa and mmHg (torr). For volumes, we may use cm3, m3, L or ft3.

### Can you use Torr in PV nRT?

In Ideal Gas Law, there's gas constant R that we need to use in the formula PV=nRT. There are times when we are given different units and we need to do conversioins and here are the proper units we use. Since PV= nRT, ... For pressure we use units like atm, kPa and mmHg (torr).

### What is equivalent to PV nRT?

V = nRT / P. Moles (n) can be set equal to PV / RT: n = PV / RT. The ideal gas constant (R) can be set equal to PV / nT: R = PV / nT.

### Is mmHg volume?

(b) If enough mercury is added to the right side to give a difference in height of 760 mmHg between the two arms, the pressure of the gas is 760 mmHg (atmospheric pressure) + 760 mmHg = 1520 mmHg and the volume is V/2.

### Why is mercury a more suitable substance to use in a barometer than water?

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. ... This is because mercury is 13.6 times more dense than water.