Achemistry student mixes 5 grams of sodium chloride (nacl) in 100 ml of water and stirs until all of the salt is dissolved. once dissolved, the student measures the electrical conductivity of the solution. an additional 5 grams of nacl is then dissolved in the solution. which statement most accurately describes how the additional five grams of salt will affect the electrical conductivity of the solution?

I think the answer is A, but I have the same question, so if you know the correct answer, could you let me know? Thanks!

Answer : option c) heat is released during the process.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.

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.