Answer:
The quantity of heat lost by the surroundings is 258,5J
Explanation:
The dissolution of salt XY is endothermic because the water temperature decreased.
The total heat consumed by the dissolution process is:
4,184 J/g°C × (75,0 + 1,50 g) × 0,93°C = 297,7 J
This heat is consumed by the calorimeter and by the surroundings.
The heat consumed by the calorimeter is:
42,2 J/°C × (0,93°C) = 39,2 J
That means that the quantity of heat lost by the surroundings is:
297,7J - 39,2J = <em>258,5 J</em>
I hope it helps!
