DP Chemistry (first assessment 2025)

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Question 23M.1A.SL.TZ2.15

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ2.15
Level SL Paper 1A Time zone TZ2
Command term Question number 15 Adapted from N/A
15.
[Maximum mark: 1]
23M.1A.SL.TZ2.15

When 100 cm−3 of 1.0 mol dm−3 HCl is mixed with 100 cm−3 of 1.0 mol dm−3 NaOH, the temperature of the resulting solution increases by 5.0 °C. What will be the temperature change, in °C, when 50 cm−3 of 2.0 mol dm−3 HCl is mixed with 50 cm−3 of 2.0 mol dm−3 NaOH?


A.  2.5

B.  5.0

C.  10

D.  20

[1]

Markscheme

C