Question

354.5 g of chlorine gas is held with a fixed volume of 70.0 L. What is the pressure of the gas in atmospheres if it’s temperature is 30.0 C

Answer 1

Answer: The pressure of the gas in atmospheres is 1.76

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = ?

V = Volume of gas = 70.0 L

n = number of moles = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{354.5g}{71g/mol}=5moles$

R = gas constant =$0.0821Latm/Kmol$

T =temperature =$30.0^0C=(30.0+273)K=300.0K$

$P=\frac{nRT}{V}$

$P=\frac{5\times 0.0821Latm/K mol\times 300K}{70.0L}=1.76$

Thus the pressure of the gas in atmospheres is 1.76