Given the three statements below, which answer is correct?
I. A sample of N₂ (boiling point = - 196 ° C) is more likely to obey the ideal gas law than a sample of SO₂ (boiling point = - 10 ° C) at 0 ° C and 1 atm of pressure.
II. The average speed of N₂ molecules is greater than SO₂ molecules if both are at 50 ° C and 1 atm.
III. The average speed of N₂ molecules at 0 ° C is less than the average speed of N₂ molecules at 25 ° C.

Question

Quizplus · Accepted Answer

I is true because gases that have a lower boiling point are generally further from condensation at a given temperature, making them behave more ideally. II is true because the average speed of gas molecules depends on their temperature and molar mass, and since both gases are at the same temperature, the lighter gas (N₂, which is nitrogen) will have a greater average speed than the heavier gas (SO₂, which is sulfur dioxide). III is true because the average speed of gas molecules increases with temperature, so N₂ molecules at 25 °C will have a greater average speed than at 0 °C.

Given the Three Statements Below, Which Answer Is Correct