A flask contains 400cm of a 5g/dm solution of potassium hydroxide. If all the
water was evaporated, what mass of
potassium hydroxide would remain?

The correct answer is:   bri hope this answer was ! : )

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

Putting salt in vinegar water