The process which absorbs the greatest amount of heat is; The boiling of 10g of water.
The complete question has the following options;
- the melting of 10 g of ice
- the freezing of 10 g of liquid water
- the boiling of 10 g of liquid water
- the condensation of 10 g of gaseous water
Heat transfer and phase changes
The conversion of a substance from solid to liquid state or liquid to gaseous state is an endothermic reaction and hence requires the addition of heat.
On this note, the boiling of 10g of liquid water absorbs the greatest amount of heat because, the first, the water needs heat for evaporation and boiling at which point, the phase change occurs.
Read more on phase changes;
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