AQA Jun 2012 Paper 5 Q2

Answers available below

do not write outside the box the following equation shows the formation of ammonia n g h g nh g the graph shows how the free energy change for this reaction varies with temperature above k g kj mol t k a write an equation to show the relationship between g h and s mark b use the graph to calculate a value for the slope gradient of the line give the units of this slope and the symbol for the thermodynamic quantity that this slope represents value of the slope units symbol marks wmp jun chem do not write outside the box c explain the significance for this reaction of temperatures below the temperature value where the line crosses the temperature axis marks d the line is not drawn below a temperature of k because its slope gradient changes at this point suggest what happens to the ammonia at k that causes the slope of the line to change mark turn over for the next question turn over wmp jun chem

Show answer