ENDOTHERMIC REACTION WITH Ba(OH)2 &amp; NH4SCN<br />
(7 of 8 - Variations Available)<br />
Lifting The Flask- Wood Is Iced To It<br />
An endothermic reaction between the compounds mixed in the flask, (BaO(H)2  &amp; NH4SCN, creates a freezing slush that makes the flask bottom stick to the piece of moistened wood.