DP Chemistry (last assessment 2024)
Question 21M.2.hl.TZ2.b(v)
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.hl.TZ2.b(v) |
| Level | hl | Paper | 2 | Time zone | TZ2 |
| Command term | State | Question number | b(v) | Adapted from | N/A |
b(v).
[Maximum mark: 1]
21M.2.hl.TZ2.b(v)
Limestone can be converted into a variety of useful commercial products through the lime cycle. Limestone contains high percentages of calcium carbonate, CaCO3.
Thermodynamic data for the decomposition of calcium carbonate is given.
State how adding a catalyst to the reaction would impact the enthalpy change of reaction, ΔH, and the activation energy, Ea.
[1]
Markscheme
ΔH same AND lower Ea ✓