Explain why a chemist boils salt water until only crystals are left.

Explanation:

When you dissolve table salt (sodium chloride, also known as NaCl) in water, are you producing a chemical change or a physical change? Well, a chemical change involves a chemical reaction, with new substances produced as a result of the change. A physical change, on the other hand, results in a change of the material's appearance, but no new chemical products result.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

it would be d. henry moseley

hope this !

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