IB Chemistry SL 1.1.3 Temperature and Kinetic Energy Question Bank

Practise IB Chemistry SL 1.1.3 with questions linking Kelvin temperature to particle kinetic energy, motion and collision behaviour.

[Maximum number: 1]

Nitrogen dioxide, $\mathrm{NO}_{2}$ , is a brown, toxic and corrosive gas. It can be made in a school laboratory by heating a group II metal nitrate or by the reaction of copper, Cu , with concentrated nitric acid, $\mathrm{HNO}_{3}$ .

The initial amount of $\mathrm{NO}_{2}$ was determined by titration. The oxide was first dissolved in water according to the following equation:

2 \mathrm{NO}_{2}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{HNO}_{3}(\mathrm{aq})+\mathrm{HNO}_{2}(\mathrm{aq})

The solution was made up to $250.0 \mathrm{~cm}^{3}$ and $25.0 \mathrm{~cm}^{3}$ portions of this solution were then titrated against a $0.0500 \mathrm{~mol} \mathrm{dm}^{-3}$ standard solution of sodium hydroxide, NaOH .

Calculate the values for temperature, T , in degrees kelvin, K , and complete the table.

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1.1.3—Temperature and kinetic energy question 1