DP Chemistry (first assessment 2025)

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Question 21N.1A.HL.TZ0.16

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.1A.HL.TZ0.16
Level HL Paper 1A Time zone TZ0
Command term Derive Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
21N.1A.HL.TZ0.16

Consider the Born–Haber cycle for the formation of sodium oxide:

What is the lattice enthalpy, in kJ mol−1, of sodium oxide?


A.  414 + 2(108) + 249 + 2(496) − 141 + 790

B.  414 + 2(108) + 249 + 2(496) + 141 + 790

C.  −414 + 2(108) + 249 + 2(496) − 141 + 790

D.  −414 − 2(108) − 249 − 2(496) + 141 − 790

[1]

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A

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