DP Chemistry (first assessment 2025)

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Question 19M.1A.SL.TZ1.15

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.SL.TZ1.15
Level SL Paper 1A Time zone TZ1
Command term Question number 15 Adapted from N/A
15.
[Maximum mark: 1]
19M.1A.SL.TZ1.15

Which is correct for the reaction?

2Al (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H2 (g)         ΔH = −1049 kJ

A. Reactants are less stable than products and the reaction is endothermic.

B. Reactants are more stable than products and the reaction is endothermic.

C. Reactants are more stable than products and the reaction is exothermic.

D. Reactants are less stable than products and the reaction is exothermic.

[1]

Markscheme

D

Examiners report

This question on enthalpy change was also well answered.

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