Caliche is made up mainly of sodium nitrate, which is soluble in water. You may assume that all the other substances present in caliche are insoluble in water. Describe the processes for obtaining pure, dry sodium nitrate crystals from caliche. Explain the purpose of each process.

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.