DP Chemistry (last assessment 2024)

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Question 23M.1.SL.TZ2.14

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1.SL.TZ2.14
Level SL Paper 1 Time zone TZ2
Command term Question number 14 Adapted from N/A
14.
[Maximum mark: 1]
23M.1.SL.TZ2.14

What is ΔH, in kJ, for the reaction N2H4 (l) + H2 (g) → 2NH3 (g)? 

Reaction ΔH
N2H4 (l) + CH3OH (l) → CH2O (g) + N2 (g) + 3H2 (g) −37 kJ
N2 (g) + 3H2 (g) → 2NH3 (g) −46 kJ
CH3OH (l) → CH2O (g) + H2 (g) −65 kJ


A.  −18

B.  18

C.  −83

D.  −148

[1]

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A

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