: At absolute zero, all molecular motion theoretically stops; therefore, every particle has a speed of Doubling the Moles (1 mole vs. 2 moles)
The shape and position of the curve remain the same because speed distribution depends on temperature and molar mass, not the total amount of gas. However, the area under the curve doubles because the total number of particles has doubled. : At absolute zero, all molecular motion theoretically
| Concept | Typical Question | Correct Answer (Short) | | :--- | :--- | :--- | | | Total number of molecules at T2 vs T1 | Same total area | | Peak behavior | What happens to peak height as T increases | Peak height decreases | | Activation Energy | Tail area (>Ea) when T increases | Tail area increases | | Catalyst | Does the M-B curve shift with a catalyst? | No, only the Ea line moves | | Light vs Heavy | Which has more high-velocity molecules? | Lighter molecules | | Most probable speed | ( v_p ) vs ( v_rms ) | ( v_rms > v_avg > v_p ) | | Concept | Typical Question | Correct Answer
: At absolute zero, all molecular motion theoretically stops; therefore, every particle has a speed of Doubling the Moles (1 mole vs. 2 moles)
The shape and position of the curve remain the same because speed distribution depends on temperature and molar mass, not the total amount of gas. However, the area under the curve doubles because the total number of particles has doubled.
| Concept | Typical Question | Correct Answer (Short) | | :--- | :--- | :--- | | | Total number of molecules at T2 vs T1 | Same total area | | Peak behavior | What happens to peak height as T increases | Peak height decreases | | Activation Energy | Tail area (>Ea) when T increases | Tail area increases | | Catalyst | Does the M-B curve shift with a catalyst? | No, only the Ea line moves | | Light vs Heavy | Which has more high-velocity molecules? | Lighter molecules | | Most probable speed | ( v_p ) vs ( v_rms ) | ( v_rms > v_avg > v_p ) |