DP Chemistry (first assessment 2025)
Question 22M.1A.HL.TZ1.16
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.HL.TZ1.16 |
| Level | HL | Paper | 1A | Time zone | TZ1 |
| Command term | State | Question number | 16 | Adapted from | N/A |
16.
[Maximum mark: 1]
22M.1A.HL.TZ1.16
Which compound has the largest value of lattice enthalpy?
A. Na2O
B. K2O
C. Na2S
D. K2S
[1]
Markscheme
A
Examiners report
A majority of students recognized the ionic compound with the highest lattice enthalpy.
Syllabus sections
Reactivity 1. What drives chemical reactions? » Reactivity 1.2—Energy cycles in reactions » Reactivity 1.2.5—A Born–Haber cycle is an application of Hess’s law, used to show energy changes in the formation of an ionic compound. Interpret and determine values from a Born–Haber cycle for compounds composed of univalent and divalent ions.