Maxwell-Boltzmann distribution and catalysts Quiz
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5 questions, one answer each
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1. When temperature increases, the Maxwell–Boltzmann curve:
- A. Has a higher peak at lower energy
- B. Has a lower peak at higher energy and the same area
- C. Has a larger total area
- D. Moves entirely to lower energy
2. A catalyst increases rate because it:
- A. Increases the temperature
- B. Increases the area under the curve
- C. Gives an alternative route with a lower activation energy
- D. Lowers the enthalpy change
3. A catalysed reaction profile has an intermediate. This appears as:
- A. A single higher peak
- B. A horizontal line
- C. A lower energy for the products
- D. A dip between two peaks
4. Peaks at +50 and +70 kJ mol⁻¹ with the intermediate at +20 kJ mol⁻¹. What is Eₐ for step 2?
- A. 50 kJ mol⁻¹
- B. 70 kJ mol⁻¹
- C. 20 kJ mol⁻¹
- D. 90 kJ mol⁻¹
5. A new catalyst lets a plant run 100 K cooler with the same rate. This is more sustainable because:
- A. The enthalpy change is lower
- B. Less fuel is burned to supply energy
- C. More waste is produced
- D. The catalyst is used up