(d) How much energy was transferred during the phase change shown on the cooling curve? Use the phase diagram and table of values below to help you answer the question.
Water
Alcohol
Heat of Vaporization, Hvap (J/g)
2,260
841
Heat of Fusion, H. (J/g)
334
fus
109
4.18
Specific Heat Capacity of the Liquid, c
(J/g. K)
2.46

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)