If some of a liquid turns into a gas by evaporation, what happens to the temperature of the remaining liquid?
Temperature is a measure of the average energy of the particles. Only the highest energy particles escape the liquid, leaving the lower energy particles behind. This decreases the average energy of the remaining particles of the liquid, so the temperature of the remaining liquid decreases.
If foods are cooked in oil instead of water, does it mean they can be cooked at higher or lower temperatures?
Higher due to the boiling point of oil.
Mass does not change during state changes.
The smaller the temperature difference between an object and its surroundings, the slower the temperature will change.
