Amixture of three noble gases has a total pressure of 1.25 atm. the individual pressures exerted by neon and argon are 0.68 atm and 0.35 atm, respectively. what is the partial pressure of the third gas, helium? use mc031-1.jpg. 0.22 atm 0.33 atm 1.03 atm 2.28 atm

Given information:

Gas mixture containing: Ne + Ar + He

Total pressure P = 1.25 atm

Partial pressure pNe = 0.68 atm

pAr = 0.35 atm

To determine:

Partial pressure of He i.e. pHe

Explanation:

As per Dalton's law, the total pressure of a gas mixture is equal to the sum of partial pressure of the gases

P = pNe + pAr + pHe

pHe = P - (pNe+pAr) = 1.25 - (0.68 + 0.35) = 0.22 atm

Partial pressure of He is 0.22 atm

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.