A quantity of lithium bromide (LiBr) is added to 30.00 g of water at 25.00 °C.
The temperature rises to 26.40 °C.
Given that the enthalpy of dissolution of LiBr is -47.50 kJ/mol, how many
grams of LiBr were added to the water? Assume that the amount of LiBr added
is small enough to have a negligible effect on the mass and volume of the
water.