Question

Give two examples of endothermic chemical reactions and give their balanced equations​

Answer 1

Reaction of barium hydroxide and ammonium chloride. Ba(OH)2 + 2 NH4Cl 2 NH4OH + BaCl2

Photosynthesis. 6 CO2+ 6 H2O +sunlight C6H12O6 + 6 O2

Reaction of magnesium carbonate when heated gives magnesium oxide and carbon dioxde gas.

Answer 2

Answer:

1) Thermal decomposition of calcium carbonate  

    CaCO3 ——————> CaO + CO2

(it‘s already balanced)

2) Thermal decomposition of lead nitrate

   2Pb(NO3)2 ———————> 2PbO + 4NO2 + O2

if you want a chemical reaction that is not decomposition then,

1)  reaction of barium hydroxide with ammonium chloride    

     BaOH + 2NH4Cl —————> BaCl2 + NH4(OH)2