Evaporation is _____________ process.
endothermic
exothermic
heating
reversible
Evaporation is an endothermic process. Water takes heat from the surroundings to get converted into vapour state.
An exothermic reaction A → B has an activation energy of 17 kJ per mole of A. The heat of reaction is 40 KJ. The activation energy for the reverse reaction B → A is
Question 5
Salt can be separated from its solution (salt dissolved in water) because (a) mixing of salt in water is a change that can be reversed by heating and melting of salt (b) mixing of salt in water is a change that cannot be reversed (c) mixing of salt in water is a permanent change (d) mixing of salt in water is a change that can be reversed by evaporation