The mixing of barium chloride and sodium sulfate is a precipitate reaction. This reaction generates barium sulfide and sodium chloride. Which best describes this reaction? Barium chloride and sodium sulfate are solids, and barium sulfide or sodium chloride must be a liquid. All of the materials are liquids. All of the materials are solids. Barium chloride and sodium sulfate are liquids, and barium sulfide or sodium chloride must be a solid.

Barium chloride and sodium sulfate are liquids, and barium sulfide or sodium chloride must be a solid.

Explanation:

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.