Rate of NH3 loss for the ammonia - agar and the sample. Method 1.9

The samples (either NI3 adduct by itself or ammonia - agar gel without NI3) were left on a balance connected to a BBC Micro B computer. The computer was set to take readings from the balance every minute for the first hour, every 5 for the second hour, every 15 for the third hour and then every half hour for a maximum of 24 hours. The point at which there was no considerable amount of weight loss, would be the point at which the ammonia had fully evaporated from the sample.

1. Times for weight loss

The times for the weight losses of for the ammonia - agar then NI3 are set out below.

 Time (mins) Weight (g) inc. holder Difference Weight of sample 0 11.7860 0.0000 4.3997 5 11.7384 0.0476 4.3521 10 11.7298 0.0562 4.3435 15 11.7213 0.0647 4.3350 20 11.7115 0.0745 4.3252 25 11.7015 0.0845 4.3152 30 11.6949 0.0911 4.3086 35 11.6892 0.0968 4.3029 40 11.6821 0.1039 4.2958 45 11.6755 0.1105 4.2892 50 11.6688 0.1172 4.2825 55 11.6612 0.1248 4.2749 60 11.6537 0.1323 4.2674 70 11.6302 0.1558 4.2439 80 11.6223 0.1637 4.2360 90 11.6093 0.1767 4.2230 100 11.5937 0.1923 4.2074 110 11.5817 0.2043 4.1954 120 11.5725 0.2135 4.1862 130 11.5602 0.2257 4.1740 140 11.5480 0.2380 4.1617 200 11.4798 0.3062 4.0935 215 11.4551 0.3309 4.0688 230 11.4380 0.3480 4.0517 245 11.3999 0.3861 4.0136 330 11.3427 0.4433 3.9564 420 11.2562 0.5298 3.8699 510 11.1532 0.6328 3.7669 1340 11.1199 0.6661 3.7336

Summary table for weight loss of ammonia from ammonia - agar sample.

 Time Weight (g) Loss (g) Time Weight (g) Loss (g) Time Weight (g) Loss (g) 0 0.2773 0.0000 30 0.2577 0.0006 65 0.2437 0.0026 1 0.2770 0.0003 31 0.2572 0.0005 70 0.2415 0.0022 2 0.2761 0.0009 32 0.2566 0.0006 75 0.2377 0.0038 3 0.2752 0.0009 33 0.2560 0.0006 80 0.2341 0.0036 4 0.2743 0.0009 34 0.2554 0.0006 85 0.2300 0.0041 5 0.2736 0.0007 35 0.2548 0.0006 90 0.2247 0.0053 6 0.2728 0.0008 36 0.2542 0.0006 95 0.2198 0.0049 7 0.2720 0.0008 37 0.2538 0.0004 100 0.2020 0.0178 8 0.2713 0.0007 38 0.2531 0.0007 105 0.1875 0.0145 9 0.2694 0.0019 39 0.2527 0.0004 110 0.1401 0.0474 10 0.2698 -0.0004 40 0.2521 0.0006 115 0.1100 0.0301 11 0.2691 0.0007 41 0.2516 0.0005 120 0.0000 0.1100 12 0.2686 0.0005 42 0.2510 0.0006 135 0.0000 0.0000 13 0.2679 0.0007 43 0.2505 0.0005 150 0.0000 0.0000 14 0.2673 0.0006 44 0.2500 0.0005 15 0.2666 0.0007 45 0.2493 0.0007 16 0.2659 0.0007 46 0.2488 0.0005 17 0.2653 0.0006 47 0.2484 0.0004 18 0.2647 0.0006 48 0.2477 0.0007 19 0.2641 0.0006 49 0.2472 0.0005 20 0.2635 0.0006 50 0.2468 0.0004 21 0.2627 0.0008 51 0.2460 0.0008 22 0.2623 0.0004 52 0.2455 0.0005 23 0.2616 0.0007 53 0.2450 0.0005 24 0.2611 0.0005 54 0.2444 0.0006 25 0.2605 0.0006 55 0.2439 0.0005 26 0.2599 0.0006 56 0.2433 0.0006 27 0.2593 0.0006 57 0.2428 0.0005 28 0.2588 0.0005 58 0.2423 0.0005 29 0.2583 0.0005 59 0.2417 0.0006 30 0.2577 -0.0006 60 0.2411 0.0006

Summary table for the evolution of ammonia from a sample of NI3. All times in minutes.

Graphs of weight loss of samples vs. time

It can be seen from the graphs that the major loss of ammonia for the agar occurs around 500 minutes. After this point, the evolution of ammonia is greatly reduced.

The NI3.NH3 lost ammonia at a steady rate for the first hour. After this point, the evolution increased until detonation occurred at the two hour mark. This experiment was repeated again and gave the same results.