Question

A glass cylinder contains 2 gases at a pressure of 106 kPa. If one gas is at 7 kPa, what is the pressure of attributed to the other gas? a) 9 kPa b) 99 kPa c) 113 kPa d) 7 kPa e) 2 kPa (URGENT)

Answer 1

Answer:

b) 99 kPa

Explanation:

According to Daltons law of partial pressure, the total pressure of a mixture of two or more non reactive gases is the sum of their individual pressures. Let the total pressure of a mixture of n number of gases be $P_{total}$ and their individual pressure be $P_1,P_2,P_3,\ .\ .\ .\ ,\ P_n$, According to Daltons partial pressure law:

$P_{total}=P_1+P_2+P_3+.\ .\ .+P_n$

Since A glass cylinder contains 2 gases at a pressure of 106 kPa, therefore n = 2. Also one gas ($P_1$) is at 7 kPa. Using Daltons partial pressure law:

$P_{total}=P_1+P_2+P_3+.\ .\ .+P_n\\P_{total}=P_1+P_2\\106\ kPa=7\ kPa+P_2\\P_2=106\ kPa-7\ kPa\\P_2=99\ kPa$