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Question 18M.1.sl.TZ1.13

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.sl.TZ1.13
Level sl Paper 1 Time zone TZ1
Command term Predict Question number 13 Adapted from N/A
13.
[Maximum mark: 1]
18M.1.sl.TZ1.13

The enthalpy of combustion of ethanol is determined by heating a known mass of tap water in a glass beaker with a flame of burning ethanol.

Which will lead to the greatest error in the final result?

A.     Assuming the density of tap water is 1.0 g cm−3

B.     Assuming all the energy from the combustion will heat the water

C.     Assuming the specific heat capacity of the tap water is 4.18 J g−1 K−1

D.     Assuming the specific heat capacity of the beaker is negligible

[1]

Markscheme

B

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