Consider a pb–35% sn alloy. determine (a) if the alloy is hypoeutectic or hypereutectic; (b) the composition of the first solid to form during solidification; (c) the amounts and compositions of each phase at 184°c; (d) the amounts and compositions of each phase at 182°c; (e) the amounts and compositions of each microconstituent at 182°c; and (f) the amounts and compositions of each phase at 25°c.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.