# What is the value of CP for diatomic gas?

## What is the value of CP for diatomic gas?

The molar specific heat of a gas at constant pressure (Cp) is the amount of heat required to raise the temperature of 1 mol of the gas by 1 C at the constant pressure. Its value for monatomic ideal gas is 5R/2 and the value for diatomic ideal gas is 7R/2.

## What is PV is equal to NRT?

In the formula P V = N R T {\displaystyle PV=NRT\,} : P is the pressure of the gas. In SI units, this is measured in Pascals, or Newtons of force per square meter of area. (“Standard atmospheric pressure at sea level” is about 101,000 Pascals, or 101 KiloPascals.

How do you get R in PV NRT?

P = Pressure (atm) V = Volume (L) n = moles R = gas constant = 0.0821 atm•L/mol•K T = Temperature (Kelvin) The correct units are essential. Be sure to convert whatever units you start with into the appropriate units when using the ideal gas law.

### Can you use mmHg in PV NRT?

Note the different value and unit for R, to be in agreement with using mmHg for the pressure unit. Alternatively, you could convert 780. mmHg to atm and then use 0.08206 L atm / mol K for the value of R. A variety of values for R can be found here.

### What is K in ideal gas law?

The ideal gas law can be written in terms of the number of molecules of gas: PV = NkT, where P is pressure, V is volume, T is temperature, N is number of molecules, and k is the Boltzmann constant k = 1.38 × 10–23 J/K. The ideal gas law is generally valid at temperatures well above the boiling temperature.

What is r in PV nRT for mmHg?

The value of the gas constant ‘R’ depends on the units used for pressure, volume and temperature. R = 0.0821 liter·atm/mol·K. R = 8.3145 J/mol·K. R = 8.2057 m3·atm/mol·K. R = 62.3637 L·Torr/mol·K or L·mmHg/mol·K. 