# Can you use mmHg in ideal gas law?

### Table of Contents

- Can you use mmHg in ideal gas law?
- What unit of pressure is needed for PV nRT?
- What is the Ideal Gas Law constant for mmHg?
- Do units matter for PV nRT?
- Is mmHg pressure or volume?
- What is R in PV nRT for mmHg?
- Can you use Torr in PV nRT?
- What is equivalent to PV nRT?
- Is mmHg volume?
- Why is mercury a more suitable substance to use in a barometer than water?

### 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 Value | Units |
---|---|

62.36 | L·torr/mol·K = L·mmHg/mol·K |

8.314 | J/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.