Question

The circle at right represents a portion of a mixture of four gases: Gas A (purpl, Gas B (brown), Gas C (green), and Gas D_2 (orange). Which gas has the highest partial pressure? Gas A has the highest partial pressure Gas B has the highest partial pressure Gas C has the highest partial pressure Gas D_2 has the highest partial pressure Which gas has the lowest partial pressure? Gas A has the lowest partial pressure Gas B has the lowest partial pressure Gas C has the lowest partial pressure Gas D_2 has the lowest partial pressure If the total pressure is 0.56 atm, what is the partial pressure of D_2?

Answer 1

The number of molecules of gas A is four The number of molecules of gas B is three The number of molecules of gas C is five. The number of molecules of gas D, is eight. The partial pressure of a gas is determined by the following formula gas total gas here. Ptotal is the total pressure and χgas is the mole fraction of the gas which is determined as shown below: Molecules of the gas asTotal molecules of all gases present From equation (1) and (2) it can be concluded that Partial pressure of the gas is directly proportional to the molecules of gas present in the mixture More the number of molecules of a particular gas more will be its partial pressure. Part (a) The gas with highest partial pressure is D, gas because it has maximum number of molecules present in the mixture. Part (b) The gas with highest partial pressure is B gas because it has minimum number of molecules present in the mixture. Part (c) The total pressure of the mixture is given as 0.56 atm.

Determine the partial pressure of D, gas as shown below Molecules of the D2 gas total ga T otal molecules of all gases presen t --× 0.56 20 -0.224 atm Hence, the partial pressure of D, gas is 0.224 atm