Edexcel IAL Chemistry Plotting Two Variables

Practise Edexcel IAL Chemistry plotting two variables with sensible scales, labelled axes, accurate points and best-fit lines or curves for practical data.

Exam points

Choose graph scales so plotted points cover enough grid space, with variables and units on the correct axes.
Plot experimental data within half a small square and include all required table points or transformed values.
Draw the specified best-fit line or curve, including origin or anomaly decisions when the mark scheme states them.

[Maximum number: 2]

The equation for the formation of ammonia in the Haber Process is shown

1 / 2 \mathrm{~N}_{2}(\mathrm{~g})+1 \frac{1}{2} \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{NH}_{3}(\mathrm{~g})

The value of the total entropy change, $\Delta S_{\text {total }}$ , varies with temperature.

Data for the value of $\Delta S_{\text {total }}$ at different temperatures but at standard pressure of 100 kPa are given for this reaction.

Table for Question B.3.2—Plotting two variables question 1 — Edexcel A-Level Chemistry A2

Plot a graph of $\Delta S_{\text {total }}$ against 1 / T on the grid.
Include a line of best fit.

Figure for Question B.3.2—Plotting two variables question 1 — Edexcel A-Level Chemistry A2

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B.3.2—Plotting two variables question 1