A balloon is filled with 39.3 g of helium at 29 °C and 2.75 atm. What is the volume of the balloon in dm³?

Question

Quizplus · Accepted Answer

Using the ideal gas law, PV = nRT, where n = mass/molar mass. For helium, molar mass = 4 g/mol. Thus, n = 39.3 g / 4 g/mol = 9.825 mol. R = 0.0821 L·atm/mol·K, T = 29°C = 302 K. Solving for V: V = nRT/P = (9.825 mol)(0.0821 L·atm/mol·K)(302 K) / 2.75 atm = 88.52 L = 88.52 dm³.

A Balloon Is Filled with 39