When 0.250 moles of licl are added to 200.0g of water in a constant pressure?

Lithium Chloride releases 37 kJ of energy per mole when dissolved in water.

Energy released = 0.25 x 37

= 9.25 kJ

= 9,250 J

Temperature change of water may be calculated using

ΔH = mCpΔT

Cp = 4.18 J/g

ΔT = 9,250 / (200 x 4.18)

ΔT = 11.1 °C