(i) Name catalyst 1 Y. (ii) Why is it not necessary to continue to supply heat once the reaction has started? 1 Answers Sample Answers and Mark Allocation Notes (a) Arrows drawn from unreacted gases to hydrogen and nitrogen box or catalyst box or between these two 1 (b) (i) Platinum, Pt 1 (b) (ii) It is an exothermic reaction The reaction produces heat 1 St Gr Ammonia is produced in the process. 1 2012 Temperature is another factor which affects the percentage yield of ammonia. (c)
(i) Name catalyst Y. 1 (ii) Why is it not necessary to continue to supply heat once the reaction has started? 1 Answers Sample Answers and Mark Allocation Notes (a) Arrows drawn from unreacted gases to hydrogen and nitrogen box or catalyst box or between these two 1 (b) (i) Platinum, Pt 1 (b) (ii) It is an exothermic reaction The reaction produces heat 1 St Gr 2012 (c) Ammonia is produced in the process. Temperature is another factor which affects the percentage yield of ammonia. 1
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