Which of the following compounds provides the most solute particles when
completely dissociated in water?
A) Na3P because it dissociates into four ions.
B)NaCl because the mass of the formula unit is the smallest.
C)MgCl2 because the mass of the particles is greater.
D)NH4 because it dissociates into five ions.

b.

the accuracy of the data.

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.

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