What is the total amount of heat energy, in joules, absorbed by 25.0
grams of water when the temperature
of the water increases from 24.0°C to
36.0°C?

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

c is the answer because when something is left after something evaporates that shows the chemical change.

let that person have a turn to speak : )