Question

What is the pressure in a 1.2 L vessel containing 0.32 moles of O₂ if the temperature is 23^oC (R, the universal gas constant, is 0.082 L atm / mole K.)

a. 0.15 atm

b. 0.50 atm

c. 6.5 atm

d. 8.6 atm

Answer 1

23^oC = 273 + 23 = 296 K

According to the ideal gas law,

$p=\frac{nRT}{V}=\frac{0.32mol\times0.082\frac{L\cdot{atm}}{mol\cdot{K}}\times296K}{1.2L}=6.5atm$

Answer: 6.5 atm (C)