25
Temperature Variation
35-
30-
25-
20-
15-
10-
5-
0-
Add HCl ....... Add NaOH
I ∙∙ ■■•••••>.
• ∙∙∙ ∙
• ∙
• 1 st Set
-5-
-10-
-15-
-20-
-25-
-30-
-35-
-40-
Heat to Boiling
-45j
10 20 30 40 50 60 70
Time (Minute)
Figure6: An example of temperature variations under the respective treatments
of adding 5ml concentrated HCl (30%) to the third reservoir, then adding 20g
NaOH to the same and third heating the same to boiling point. The signatures of
these remote treatments induced temperature changes were clear and
repeatedly observable in quite a few experiments conducted to date. The
general background trend of the temperature first increasing, flattening and
decreasing was due to environmental temperature change.