To reduce dangerous swelling in the brain, physicians sometimes administer intravenous hypertonic saline, a 7.0 %(w/v) solution of salt (NaCl) in water. Calculate the volume of this solution that contains 3.5 g of NaCl. Be sure your answer has a unit symbol and is rounded to the correct number of significant digits.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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