DP Chemistry (last assessment 2024)

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Question 18N.2.sl.TZ0.7c

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.2.sl.TZ0.7c
Level sl Paper 2 Time zone TZ0
Command term Determine Question number c Adapted from N/A
c.
[Maximum mark: 1]
18N.2.sl.TZ0.7c

Consider the following Hess’s law cycle:

(c)

Determine the standard enthalpy change, ΔHΘ, of step 1.

[1]

Markscheme

«−1697 kJ + 1561 kJ =» −136 «kJ»

OR

«ΔHΘ = Δ H f θ (products) − Δ H f θ (reactants) = −84 kJ − 52 kJ =» −136 «kJ» ✔

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