Answer: lower activation energy.
- A higher activation energy
- B greater enthalpy change
- C a larger equilibrium constant
- D lower activation energy
Correct answer: D. lower activation energy
Explanation: A catalyst offers a route of lower activation energy so more molecules can react, but it does not change delta H or the equilibrium constant.
A typical adsorption isotherm: x/m (mass adsorbed per gram of adsorbent) rises steeply at low pressure, then flattens into a saturation plateau as the adsorbent surface fills up.
Concept context
Explore the chemistry that happens at interfaces, from catalysts that speed up industrial reactions to colloids like milk, smoke, and gels that surround us every day.