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Heat of Solutions


Summary:  Calcium chloride (exothermic) and ammonium chloride (endothermic) are added to water.  The temperature change of the solution is measured and displayed using a large digital thermometer.  The demonstration can be done either qualitatively or quantitatively.  Other salts can be used in place of those listed.


Chemicals and Solutions: 

Calcium chloride 10 g (record weight used)

Ammonium Chloride 10g (record weight used)



Digital display and temperature probe

Two 250mL beakers,  



Dissolve each salt in 100 mL water and show the temperature change









To schedule a demonstration, please send an email to the demonstration lab.



Eric Camp

Lecture Demonstration Technician

Bagley Hall 171

(206) 543-1606


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