# Is an endothermic process an example of a physical or chemical change?

Dec 18, 2016

The electrolysis of water $2 {H}_{2} O \to 2 {H}_{2} + {O}_{2}$
The 'burning' of limestone to get quicklime: $C a C {O}_{3} \to C a O + C {O}_{2}$