Problem: Which process is endothermic?a) the evaporation of water from the skinb) the burning of candle waxc) the oxidation of iron in a chemical hand warmerd) the combustion of natural gas in a stove

FREE Expert Solution

Recall that:

Exothermic reactions: lose energy and involve bonds breaking; ΔH is negative

Endothermic reactions: gain energy and involve bonds forming; ΔH is positive


Evaporation → liquid to gas → energy/heat is needed.

Combustion/burning → energy/heat is released.

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Problem Details

Which process is endothermic?
a) the evaporation of water from the skin
b) the burning of candle wax
c) the oxidation of iron in a chemical hand warmer
d) the combustion of natural gas in a stove

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